SPR-6763: more methods on StandardEvaluationContext supporting add/remove from resolver/accessor strategies

git-svn-id: https://src.springframework.org/svn/spring-framework/trunk@2902 50f2f4bb-b051-0410-bef5-90022cba6387

org.springframework.expression/src/main/java/org/springframework/expression/spel/support/StandardEvaluationContext.java

@@ -97,11 +97,20 @@ public class StandardEvaluationContext implements EvaluationContext {
 		ensureConstructorResolversInitialized();
 		this.constructorResolvers.add(this.constructorResolvers.size() - 1, resolver);
 	}
+
+	public boolean removeConstructorResolver(ConstructorResolver resolver) {
+		ensureConstructorResolversInitialized();
+		return this.constructorResolvers.remove(resolver);
+	}
 	
 	public List<ConstructorResolver> getConstructorResolvers() {
 		ensureConstructorResolversInitialized();
 		return this.constructorResolvers;
 	}
+	
+	public void setConstructorResolvers(List<ConstructorResolver> constructorResolvers) {
+		this.constructorResolvers = constructorResolvers;
+	}
 
 	private void ensureConstructorResolversInitialized() {
 		if (this.constructorResolvers == null) {
@@ -114,11 +123,20 @@ public class StandardEvaluationContext implements EvaluationContext {
 		ensureMethodResolversInitialized();
 		this.methodResolvers.add(this.methodResolvers.size() - 1, resolver);
 	}
+	
+	public boolean removeMethodResolver(MethodResolver methodResolver) {
+		ensureMethodResolversInitialized();
+		return this.methodResolvers.remove(methodResolver);
+	}
 
 	public List<MethodResolver> getMethodResolvers() {
 		ensureMethodResolversInitialized();
 		return this.methodResolvers;
 	}
+
+	public void setMethodResolvers(List<MethodResolver> methodResolvers) {
+		this.methodResolvers = methodResolvers;
+	}
 	
 	private void ensureMethodResolversInitialized() {
 		if (this.methodResolvers == null) {
@@ -131,11 +149,19 @@ public class StandardEvaluationContext implements EvaluationContext {
 		ensurePropertyAccessorsInitialized();
 		this.propertyAccessors.add(this.propertyAccessors.size() - 1, accessor);
 	}
+	
+	public boolean removePropertyAccessor(PropertyAccessor accessor) {
+		return this.propertyAccessors.remove(accessor);
+	}
 
 	public List<PropertyAccessor> getPropertyAccessors() {
 		ensurePropertyAccessorsInitialized();
 		return this.propertyAccessors;
 	}
+	
+	public void setPropertyAccessors(List<PropertyAccessor> propertyAccessors) {
+		this.propertyAccessors = propertyAccessors;
+	}
 
 	private void ensurePropertyAccessorsInitialized() {
 		if (this.propertyAccessors == null) {

org.springframework.expression/src/test/java/org/springframework/expression/spel/ConstructorInvocationTests.java

@@ -16,9 +16,16 @@
 
 package org.springframework.expression.spel;
 
+import java.util.ArrayList;
+import java.util.List;
+
 import org.junit.Assert;
 import org.junit.Ignore;
 import org.junit.Test;
+import org.springframework.expression.AccessException;
+import org.springframework.expression.ConstructorExecutor;
+import org.springframework.expression.ConstructorResolver;
+import org.springframework.expression.EvaluationContext;
 import org.springframework.expression.Expression;
 import org.springframework.expression.spel.standard.SpelExpressionParser;
 import org.springframework.expression.spel.support.StandardEvaluationContext;
@@ -140,6 +147,37 @@ public class ConstructorInvocationTests extends ExpressionTestCase {
 		Assert.assertEquals(4,parser.parseExpression("counter").getValue(eContext));
 	}
 	
+	@Test
+	public void testAddingConstructorResolvers() {
+		StandardEvaluationContext ctx = new StandardEvaluationContext();
+		
+		// reflective constructor accessor is the only one by default
+		List<ConstructorResolver> constructorResolvers = ctx.getConstructorResolvers();
+		Assert.assertEquals(1,constructorResolvers.size());
+		
+		ConstructorResolver dummy = new DummyConstructorResolver();
+		ctx.addConstructorResolver(dummy);
+		Assert.assertEquals(2,ctx.getConstructorResolvers().size());
+		
+		List<ConstructorResolver> copy = new ArrayList<ConstructorResolver>();
+		copy.addAll(ctx.getConstructorResolvers());
+		Assert.assertTrue(ctx.removeConstructorResolver(dummy));
+		Assert.assertFalse(ctx.removeConstructorResolver(dummy));
+		Assert.assertEquals(1,ctx.getConstructorResolvers().size());
+		
+		ctx.setConstructorResolvers(copy);
+		Assert.assertEquals(2,ctx.getConstructorResolvers().size());
+	}
+	
+	static class DummyConstructorResolver implements ConstructorResolver {
+
+		public ConstructorExecutor resolve(EvaluationContext context, String typeName, Class<?>[] argumentTypes)
+				throws AccessException {
+			throw new UnsupportedOperationException("Auto-generated method stub");
+		}
+		
+	}
+	
 	@Test
 	public void testVarargsInvocation01() {
 		// Calling 'Fruit(String... strings)'

org.springframework.expression/src/test/java/org/springframework/expression/spel/MethodInvocationTests.java

@@ -25,8 +25,12 @@ import java.util.List;
 
 import org.junit.Assert;
 import org.junit.Test;
+import org.springframework.expression.AccessException;
+import org.springframework.expression.EvaluationContext;
 import org.springframework.expression.Expression;
+import org.springframework.expression.MethodExecutor;
 import org.springframework.expression.MethodFilter;
+import org.springframework.expression.MethodResolver;
 import org.springframework.expression.spel.standard.SpelExpression;
 import org.springframework.expression.spel.standard.SpelExpressionParser;
 import org.springframework.expression.spel.support.StandardEvaluationContext;
@@ -243,6 +247,38 @@ public class MethodInvocationTests extends ExpressionTestCase {
 		}
 		
 	}
+	
+	@Test
+	public void testAddingMethodResolvers() {
+		StandardEvaluationContext ctx = new StandardEvaluationContext();
+		
+		// reflective method accessor is the only one by default
+		List<MethodResolver> methodResolvers = ctx.getMethodResolvers();
+		Assert.assertEquals(1,methodResolvers.size());
+		
+		MethodResolver dummy = new DummyMethodResolver();
+		ctx.addMethodResolver(dummy);
+		Assert.assertEquals(2,ctx.getMethodResolvers().size());
+		
+		List<MethodResolver> copy = new ArrayList<MethodResolver>();
+		copy.addAll(ctx.getMethodResolvers());
+		Assert.assertTrue(ctx.removeMethodResolver(dummy));
+		Assert.assertFalse(ctx.removeMethodResolver(dummy));
+		Assert.assertEquals(1,ctx.getMethodResolvers().size());
+		
+		ctx.setMethodResolvers(copy);
+		Assert.assertEquals(2,ctx.getMethodResolvers().size());
+	}
+	
+	static class DummyMethodResolver implements MethodResolver {
+
+		public MethodExecutor resolve(EvaluationContext context, Object targetObject, String name,
+				Class<?>[] argumentTypes) throws AccessException {
+			throw new UnsupportedOperationException("Auto-generated method stub");
+		}
+		
+	}
+
 
 	@Test
 	public void testVarargsInvocation01() {

org.springframework.expression/src/test/java/org/springframework/expression/spel/PropertyAccessTests.java

@@ -16,6 +16,9 @@
 
 package org.springframework.expression.spel;
 
+import java.util.ArrayList;
+import java.util.List;
+
 import junit.framework.Assert;
 
 import org.junit.Test;
@@ -129,6 +132,28 @@ public class PropertyAccessTests extends ExpressionTestCase {
 			// System.out.println(e.getMessage());
 		}
 	}
+	
+	@Test
+	public void testAddingRemovingAccessors() {
+		StandardEvaluationContext ctx = new StandardEvaluationContext();
+		
+		// reflective property accessor is the only one by default
+		List<PropertyAccessor> propertyAccessors = ctx.getPropertyAccessors();
+		Assert.assertEquals(1,propertyAccessors.size());
+		
+		StringyPropertyAccessor spa = new StringyPropertyAccessor();
+		ctx.addPropertyAccessor(spa);
+		Assert.assertEquals(2,ctx.getPropertyAccessors().size());
+		
+		List<PropertyAccessor> copy = new ArrayList<PropertyAccessor>();
+		copy.addAll(ctx.getPropertyAccessors());
+		Assert.assertTrue(ctx.removePropertyAccessor(spa));
+		Assert.assertFalse(ctx.removePropertyAccessor(spa));
+		Assert.assertEquals(1,ctx.getPropertyAccessors().size());
+		
+		ctx.setPropertyAccessors(copy);
+		Assert.assertEquals(2,ctx.getPropertyAccessors().size());
+	}
 
 
 	// This can resolve the property 'flibbles' on any String (very useful...)