Modified public interface to expression parsing
git-svn-id: https://src.springframework.org/svn/spring-framework/trunk@4 50f2f4bb-b051-0410-bef5-90022cba6387
This commit is contained in:
Andy Clement
parent
860a8a3f15
commit
3e04a0ca2d
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@ -9,12 +9,11 @@
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<classpathentry kind="var" path="IVY_CACHE/org.apache.commons/com.springsource.org.apache.commons.logging/1.1.1/com.springsource.org.apache.commons.logging-1.1.1.jar" sourcepath="/IVY_CACHE/org.apache.commons/com.springsource.org.apache.commons.logging/1.1.1/com.springsource.org.apache.commons.logging-sources-1.1.1.jar"/>
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<classpathentry kind="var" path="IVY_CACHE/org.apache.log4j/com.springsource.org.apache.log4j/1.2.15/com.springsource.org.apache.log4j-1.2.15.jar" sourcepath="/IVY_CACHE/org.apache.log4j/com.springsource.org.apache.log4j/1.2.15/com.springsource.org.apache.log4j-sources-1.2.15.jar"/>
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<classpathentry kind="var" path="IVY_CACHE/org.easymock/com.springsource.org.easymock/2.3.0/com.springsource.org.easymock-2.3.0.jar" sourcepath="/IVY_CACHE/org.easymock/com.springsource.org.easymock/2.3.0/com.springsource.org.easymock-sources-2.3.0.jar"/>
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<classpathentry kind="var" path="IVY_CACHE/org.jboss.el/com.springsource.org.jboss.el/2.0.0.GA/com.springsource.org.jboss.el-2.0.0.GA.jar" sourcepath="/IVY_CACHE/org.jboss.el/com.springsource.org.jboss.el/2.0.0.GA/com.springsource.org.jboss.el-sources-2.0.0.GA.jar"/>
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<classpathentry kind="var" path="IVY_CACHE/org.junit/com.springsource.junit/3.8.2/com.springsource.junit-3.8.2.jar" sourcepath="/IVY_CACHE/org.junit/com.springsource.junit/3.8.2/com.springsource.junit-sources-3.8.2.jar"/>
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<classpathentry kind="var" path="IVY_CACHE/org.springframework/org.springframework.beans/2.5.4.A/org.springframework.beans-2.5.4.A.jar" sourcepath="/IVY_CACHE/org.springframework/org.springframework.beans/2.5.4.A/org.springframework.beans-sources-2.5.4.A.jar"/>
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<classpathentry kind="var" path="IVY_CACHE/org.springframework/org.springframework.context/2.5.4.A/org.springframework.context-2.5.4.A.jar" sourcepath="/IVY_CACHE/org.springframework/org.springframework.context/2.5.4.A/org.springframework.context-sources-2.5.4.A.jar"/>
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<classpathentry kind="var" path="IVY_CACHE/org.springframework/org.springframework.core/2.5.4.A/org.springframework.core-2.5.4.A.jar" sourcepath="/IVY_CACHE/org.springframework/org.springframework.core/2.5.4.A/org.springframework.core-sources-2.5.4.A.jar"/>
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<classpathentry kind="var" path="IVY_CACHE/org.ognl/com.springsource.org.ognl/2.7.3/com.springsource.org.ognl-2.7.3.jar"/>
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<classpathentry kind="var" path="IVY_CACHE/org.jboss.javassist/com.springsource.javassist/3.3.0.ga/com.springsource.javassist-3.3.0.ga.jar"/>
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<classpathentry kind="var" path="IVY_CACHE/org.antlr/com.springsource.org.antlr/3.0.1/com.springsource.org.antlr-3.0.1.jar"/>
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<classpathentry kind="output" path="target/classes"/>
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</classpath>
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@ -1,4 +1,4 @@
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#Thu Jul 10 09:39:34 BST 2008
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#Tue Jul 15 16:39:56 PDT 2008
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eclipse.preferences.version=1
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org.eclipse.jdt.core.codeComplete.argumentPrefixes=
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org.eclipse.jdt.core.codeComplete.argumentSuffixes=
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@ -9,22 +9,22 @@ org.eclipse.jdt.core.codeComplete.localSuffixes=
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org.eclipse.jdt.core.codeComplete.staticFieldPrefixes=
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org.eclipse.jdt.core.codeComplete.staticFieldSuffixes=
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org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
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org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.2
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org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.5
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org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
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org.eclipse.jdt.core.compiler.compliance=1.4
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org.eclipse.jdt.core.compiler.compliance=1.5
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org.eclipse.jdt.core.compiler.debug.lineNumber=generate
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org.eclipse.jdt.core.compiler.debug.localVariable=generate
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org.eclipse.jdt.core.compiler.debug.sourceFile=generate
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org.eclipse.jdt.core.compiler.doc.comment.support=enabled
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org.eclipse.jdt.core.compiler.problem.annotationSuperInterface=warning
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org.eclipse.jdt.core.compiler.problem.assertIdentifier=warning
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org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
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org.eclipse.jdt.core.compiler.problem.autoboxing=ignore
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org.eclipse.jdt.core.compiler.problem.deprecation=warning
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org.eclipse.jdt.core.compiler.problem.deprecationInDeprecatedCode=disabled
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org.eclipse.jdt.core.compiler.problem.deprecationWhenOverridingDeprecatedMethod=disabled
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org.eclipse.jdt.core.compiler.problem.discouragedReference=warning
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org.eclipse.jdt.core.compiler.problem.emptyStatement=ignore
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org.eclipse.jdt.core.compiler.problem.enumIdentifier=warning
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org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
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org.eclipse.jdt.core.compiler.problem.fallthroughCase=ignore
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org.eclipse.jdt.core.compiler.problem.fieldHiding=ignore
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org.eclipse.jdt.core.compiler.problem.finalParameterBound=warning
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@ -79,7 +79,7 @@ org.eclipse.jdt.core.compiler.problem.unusedParameterWhenImplementingAbstract=di
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org.eclipse.jdt.core.compiler.problem.unusedParameterWhenOverridingConcrete=disabled
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org.eclipse.jdt.core.compiler.problem.unusedPrivateMember=warning
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org.eclipse.jdt.core.compiler.problem.varargsArgumentNeedCast=warning
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org.eclipse.jdt.core.compiler.source=1.3
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org.eclipse.jdt.core.compiler.source=1.5
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org.eclipse.jdt.core.formatter.align_type_members_on_columns=false
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org.eclipse.jdt.core.formatter.alignment_for_arguments_in_allocation_expression=16
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org.eclipse.jdt.core.formatter.alignment_for_arguments_in_enum_constant=16
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@ -1,4 +1,4 @@
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#Wed Jun 25 10:24:03 EDT 2008
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#Tue Aug 05 13:11:35 PDT 2008
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eclipse.preferences.version=1
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editor_save_participant_org.eclipse.jdt.ui.postsavelistener.cleanup=true
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formatter_profile=_Spring Java Conventions
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@ -21,7 +21,7 @@ sp_cleanup.always_use_parentheses_in_expressions=false
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sp_cleanup.always_use_this_for_non_static_field_access=false
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sp_cleanup.always_use_this_for_non_static_method_access=false
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sp_cleanup.convert_to_enhanced_for_loop=false
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sp_cleanup.format_source_code=true
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sp_cleanup.format_source_code=false
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sp_cleanup.make_local_variable_final=false
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sp_cleanup.make_parameters_final=false
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sp_cleanup.make_private_fields_final=true
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@ -22,6 +22,8 @@
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<!-- compile dependencies -->
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<dependency org="org.apache.commons" name="com.springsource.org.apache.commons.logging" rev="1.1.1" conf="compile->runtime" />
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<dependency org="org.springframework" name="org.springframework.core" rev="latest.integration" conf="compile->runtime" />
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<dependency org="org.antlr" name="com.springsource.org.antlr" rev="3.0.1" conf="compile->runtime"/>
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<!-- test dependencies -->
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<dependency org="org.apache.log4j" name="com.springsource.org.apache.log4j" rev="1.2.15" conf="test->runtime"/>
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@ -1,66 +0,0 @@
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/*
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* Copyright 2004-2008 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.springframework.binding.expression;
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/**
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* Indicates an expression evaluation failed.
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*
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* @author Keith Donald
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*/
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public class EvaluationException extends RuntimeException {
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private Class contextClass;
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private String expressionString;
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/**
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* Creates a new evaluation exception.
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* @param contextClass the class of object upon which evaluation was attempted
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* @param expressionString the string form of the expression that failed to evaluate
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* @param message the exception message
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*/
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public EvaluationException(Class contextClass, String expressionString, String message) {
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this(contextClass, expressionString, message, null);
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}
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/**
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* Creates a new evaluation exception.
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* @param contextClass the class of object upon which evaluation was attempted
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* @param expressionString the string form of the expression that failed to evaluate
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* @param message the exception message
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* @param cause the underlying cause of this evaluation exception
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*/
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public EvaluationException(Class contextClass, String expressionString, String message, Throwable cause) {
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super(message, cause);
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}
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/**
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* The class of object upon which evaluation was attempted and failed.
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* @return the context class
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*/
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public Class getContextClass() {
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return contextClass;
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}
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/**
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* The string form of the expression that failed to evaluate against an instance of the the context class.
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* @return the expression string
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*/
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public String getExpressionString() {
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return expressionString;
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}
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}
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@ -13,7 +13,10 @@
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.springframework.binding.expression;
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package org.springframework.expression;
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import org.springframework.expression.spel.SpelException;
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/**
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* An expression capable of evaluating itself against context objects. Encapsulates the details of a previously parsed
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@ -21,16 +24,47 @@ package org.springframework.binding.expression;
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* the Unified EL.
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*
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* @author Keith Donald
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* @author Andy Clement
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*/
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public interface Expression {
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/**
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* Evaluate this expression in the default standard context.
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* @return the evaluation result
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* @throws EvaluationException an exception occurred during expression evaluation
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*/
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public Object getValue() throws EvaluationException;
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/**
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* Evaluate the expression in the default standard context. If the result of the evaluation
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* does not match (and cannot be converted to) the expected result type then an
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* exception will be returned.
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*
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* @param expectedResultType the class the caller would like the result to be
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* @return the value of the expression
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* @throws EvaluationException if there is a problem with evaluation of the expression.
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*/
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public Object getValue(Class<?> expectedResultType) throws EvaluationException;
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/**
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* Evaluate this expression in the provided context and return the result of evaluation.
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* @param context the context to evaluate this expression in
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* @return the evaluation result
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* @throws EvaluationException an exception occurred during expression evaluation
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*/
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public Object getValue(Object context) throws EvaluationException;
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public Object getValue(EvaluationContext context) throws EvaluationException;
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/**
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* Evaluate the expression in a specified context which can resolve references to properties, methods, types, etc -
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* the type of the evaluation result is expected to be of a particular class and an exception will be thrown if it
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* is not and cannot be converted to that type.
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*
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* @param context the context in which to evaluate the expression
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* @param expectedResultType the class the caller would like the result to be
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* @return the value of the expression
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* @throws SpelException if there is a problem with evaluation of the expression.
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*/
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public Object getValue(EvaluationContext context, Class<?> expectedResultType) throws EvaluationException;
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/**
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* Set this expression in the provided context to the value provided.
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@ -38,16 +72,16 @@ public interface Expression {
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* @param value the new value to set
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* @throws EvaluationException an exception occurred during expression evaluation
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*/
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public void setValue(Object context, Object value) throws EvaluationException;
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public void setValue(EvaluationContext context, Object value) throws EvaluationException;
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/**
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* Returns the most general type that can be passed to the {@link #setValue(Object, Object)} method for the given
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* Returns the most general type that can be passed to the {@link #setValue(EvaluationContext, Object)} method for the given
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* context.
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* @param context the context to evaluate
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* @return the most general type of value that can be set on this context
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* @throws EvaluationException an exception occurred during expression evaluation
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*/
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public Class getValueType(Object context) throws EvaluationException;
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public Class getValueType(EvaluationContext context) throws EvaluationException;
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/**
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* Returns the original string used to create this expression, unmodified.
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@ -55,4 +89,5 @@ public interface Expression {
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*/
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public String getExpressionString();
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}
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@ -13,18 +13,19 @@
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.springframework.binding.expression;
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package org.springframework.expression;
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/**
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* Parses expression strings into compiled expressions that can be evaluated. Supports parsing templates as well as
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* standard expression strings.
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*
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* @author Keith Donald
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* @author Andy Clement
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*/
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public interface ExpressionParser {
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/**
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* Parse the expression string and return a compiled Expression object you can use for evaluation. Some examples:
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* Parse the expression string and return an Expression object you can use for repeated evaluation. Some examples:
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*
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* <pre>
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* 3 + 4
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@ -34,8 +35,22 @@ public interface ExpressionParser {
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* @param expressionString the raw expression string to parse
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* @param context a context for influencing this expression parsing routine (optional)
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* @return an evaluator for the parsed expression
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* @throws ParserException an exception occurred during parsing
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* @throws ParseException an exception occurred during parsing
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*/
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public Expression parseExpression(String expressionString, ParserContext context) throws ParserException;
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public Expression parseExpression(String expressionString, ParserContext context) throws ParseException;
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/**
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* Parse the expression string and return an Expression object you can use for repeated evaluation. Some examples:
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*
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* <pre>
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* 3 + 4
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* name.firstName
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* </pre>
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*
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* @param expressionString the raw expression string to parse
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* @return an evaluator for the parsed expression
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* @throws ParseException an exception occurred during parsing
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*/
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public Expression parseExpression(String expressionString) throws ParseException;
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}
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@ -1,95 +0,0 @@
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/*
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* Copyright 2004-2008 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
|
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
|
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* distributed under the License is distributed on an "AS IS" BASIS,
|
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
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* See the License for the specific language governing permissions and
|
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* limitations under the License.
|
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*/
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package org.springframework.binding.expression;
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/**
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* An expression variable.
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* @author Keith Donald
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*/
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public class ExpressionVariable {
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private String name;
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private String valueExpression;
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private ParserContext parserContext;
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/**
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* Creates a new expression variable.
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* @param name the name of the variable, acting as an convenient alias (required)
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* @param valueExpression the value expression (required)
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*/
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public ExpressionVariable(String name, String valueExpression) {
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init(name, valueExpression, null);
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}
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/**
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* Creates a new expression variable with a populated parser context.
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* @param name the name of the variable, acting as an convenient alias (required)
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* @param valueExpression the value expression (required)
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* @param parserContext the parser context to use to parse the value expression (optional)
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*/
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public ExpressionVariable(String name, String valueExpression, ParserContext parserContext) {
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init(name, valueExpression, parserContext);
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}
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/**
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* Returns the variable name.
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* @return the variable name
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*/
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public String getName() {
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return name;
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}
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/**
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* Returns the expression that will be evaluated when the variable is referenced by its name in another expression.
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* @return the expression value.
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*/
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public String getValueExpression() {
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return valueExpression;
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}
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/**
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* Returns the parser context to use to parse the variable's value expression.
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* @return the value expression parser context
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*/
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public ParserContext getParserContext() {
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return parserContext;
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}
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public boolean equals(Object o) {
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if (!(o instanceof ExpressionVariable)) {
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return false;
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}
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ExpressionVariable var = (ExpressionVariable) o;
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return name.equals(var.name);
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}
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public int hashCode() {
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return name.hashCode();
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}
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public String toString() {
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return "[Expression Variable '" + name + "']";
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}
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private void init(String name, String valueExpression, ParserContext parserContext) {
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this.name = name;
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this.valueExpression = valueExpression;
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this.parserContext = parserContext;
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}
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}
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@ -13,46 +13,43 @@
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* See the License for the specific language governing permissions and
|
||||
* limitations under the License.
|
||||
*/
|
||||
package org.springframework.binding.expression;
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package org.springframework.expression;
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|
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/**
|
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* Input provided to an expression parser that can influence an expression parsing/compilation routine.
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*
|
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* @author Keith Donald
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* @author Andy Clement
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*/
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public interface ParserContext {
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|
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/**
|
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* Returns the type of context object the parsed expression will evaluate in. An expression parser may use this
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* value to install custom variable resolves for that particular type of context.
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* @return the evaluation context type
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*/
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public Class getEvaluationContextType();
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/**
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* Returns the expected type of object returned from evaluating the parsed expression. An expression parser may use
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* this value to coerce an raw evaluation result before it is returned.
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* @return the expected evaluation result type
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||||
*/
|
||||
public Class getExpectedEvaluationResultType();
|
||||
|
||||
/**
|
||||
* Returns additional expression variables or aliases that can be referenced during expression evaluation. An
|
||||
* expression parser will register these variables for reference during evaluation.
|
||||
*/
|
||||
public ExpressionVariable[] getExpressionVariables();
|
||||
|
||||
/**
|
||||
* Whether or not the expression being parsed is a template. A template expression consists of literal text that can
|
||||
* be mixed with evaluatable blocks. Some examples:
|
||||
*
|
||||
* <pre>
|
||||
* Some literal text
|
||||
* Hello #{name.firstName}!
|
||||
* #{3 + 4}
|
||||
* Hello ${name.firstName}!
|
||||
* ${3 + 4}
|
||||
* </pre>
|
||||
*
|
||||
* @return true if the expression is a template, false otherwise
|
||||
*/
|
||||
public boolean isTemplate();
|
||||
|
||||
/**
|
||||
* For template expressions, returns the prefix that identifies the start of an expression block within a string.
|
||||
* For example "${"
|
||||
*
|
||||
* @return the prefix that identifies the start of an expression
|
||||
*/
|
||||
public String getExpressionPrefix();
|
||||
|
||||
/**
|
||||
* For template expressions, return the prefix that identifies the end of an expression block within a string. For
|
||||
* example "}$"
|
||||
*
|
||||
* @return the suffix that identifies the end of an expression
|
||||
*/
|
||||
public String getExpressionSuffix();
|
||||
}
|
||||
|
|
@ -1,56 +0,0 @@
|
|||
/*
|
||||
* Copyright 2004-2008 the original author or authors.
|
||||
*
|
||||
* Licensed under the Apache License, Version 2.0 (the "License");
|
||||
* you may not use this file except in compliance with the License.
|
||||
* You may obtain a copy of the License at
|
||||
*
|
||||
* http://www.apache.org/licenses/LICENSE-2.0
|
||||
*
|
||||
* Unless required by applicable law or agreed to in writing, software
|
||||
* distributed under the License is distributed on an "AS IS" BASIS,
|
||||
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
* See the License for the specific language governing permissions and
|
||||
* limitations under the License.
|
||||
*/
|
||||
package org.springframework.binding.expression;
|
||||
|
||||
/**
|
||||
* Base class for exceptions thrown during expression parsing.
|
||||
*
|
||||
* @author Keith Donald
|
||||
*/
|
||||
public class ParserException extends RuntimeException {
|
||||
|
||||
/**
|
||||
* The expression string that could not be parsed.
|
||||
*/
|
||||
private String expressionString;
|
||||
|
||||
/**
|
||||
* Creates a new expression parsing exception.
|
||||
* @param expressionString the expression string that could not be parsed
|
||||
* @param cause the underlying cause of this exception
|
||||
*/
|
||||
public ParserException(String expressionString, Throwable cause) {
|
||||
this(expressionString, "Unable to parse expression string '" + expressionString + "'", cause);
|
||||
}
|
||||
|
||||
/**
|
||||
* Creates a new expression parsing exception.
|
||||
* @param expressionString the expression string that could not be parsed
|
||||
* @param message a descriptive message
|
||||
* @param cause the underlying cause of this exception
|
||||
*/
|
||||
public ParserException(String expressionString, String message, Throwable cause) {
|
||||
super(message, cause);
|
||||
this.expressionString = expressionString;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the expression string that could not be parsed.
|
||||
*/
|
||||
public Object getExpressionString() {
|
||||
return expressionString;
|
||||
}
|
||||
}
|
||||
|
|
@ -1,36 +0,0 @@
|
|||
/*
|
||||
* Copyright 2004-2008 the original author or authors.
|
||||
*
|
||||
* Licensed under the Apache License, Version 2.0 (the "License");
|
||||
* you may not use this file except in compliance with the License.
|
||||
* You may obtain a copy of the License at
|
||||
*
|
||||
* http://www.apache.org/licenses/LICENSE-2.0
|
||||
*
|
||||
* Unless required by applicable law or agreed to in writing, software
|
||||
* distributed under the License is distributed on an "AS IS" BASIS,
|
||||
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
* See the License for the specific language governing permissions and
|
||||
* limitations under the License.
|
||||
*/
|
||||
package org.springframework.binding.expression;
|
||||
|
||||
/**
|
||||
* An evaluation exception indicating a expression that references a property failed to evaluate because the property
|
||||
* could not be found.
|
||||
* @author Keith Donald
|
||||
*/
|
||||
public class PropertyNotFoundException extends EvaluationException {
|
||||
|
||||
/**
|
||||
* Creates a new property not found exception
|
||||
* @param contextClass the class of object upon which property evaluation was attempted
|
||||
* @param property the property that could not be found
|
||||
* @param cause root cause of the failure
|
||||
*/
|
||||
public PropertyNotFoundException(Class contextClass, String property, Throwable cause) {
|
||||
super(contextClass, property, "Property '" + property + "' not found on context of class ["
|
||||
+ contextClass.getName() + "]", cause);
|
||||
}
|
||||
|
||||
}
|
||||
|
|
@ -1,7 +0,0 @@
|
|||
<html>
|
||||
<body>
|
||||
<p>
|
||||
Core expression language abstraction for parsing and evaluating expressions.
|
||||
</p>
|
||||
</body>
|
||||
</html>
|
||||
|
|
@ -1,7 +0,0 @@
|
|||
<html>
|
||||
<body>
|
||||
<p>
|
||||
The Spring Data Binding framework, an internal library used by Spring Web Flow.
|
||||
</p>
|
||||
</body>
|
||||
</html>
|
||||
|
|
@ -5,3 +5,4 @@ Bundle-ManifestVersion: 2
|
|||
Import-Template:
|
||||
org.springframework.core;version="[3.0.0, 3.0.1)",
|
||||
org.apache.commons.logging;version="[1.1.1, 2.0.0)",
|
||||
org.antlr.runtime;version="[3.0.0,3.0.1)", org.antlr.runtime.tree;version="[3.0.0,3.0.1)"
|
||||
Loading…
Reference in New Issue