/*
 * Copyright 1999-2018 Alibaba Group Holding Ltd.
 *
 * 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 com.alibaba.druid.mock;

import java.io.*;
import java.sql.Clob;
import java.sql.SQLException;

public class MockClob implements Clob {
    private byte[] bytes;
    private ByteArrayOutputStream out = new ByteArrayOutputStream();

    public MockClob() {
        this(new byte[0]);
    }

    public MockClob(byte[] bytes) {
        this.bytes = bytes;
    }

    @Override
    public long length() throws SQLException {
        return bytes.length;
    }

    @Override
    public String getSubString(long pos, int length) throws SQLException {
        return new String(bytes, (int) (pos - 1), length);
    }

    @Override
    public Reader getCharacterStream() throws SQLException {
        return null;
    }

    @Override
    public InputStream getAsciiStream() throws SQLException {
        return new ByteArrayInputStream(bytes);
    }

    @Override
    public long position(String searchstr, long start) throws SQLException {
        if (bytes.length == 0) {
            return 0;
        }

        return new String(bytes).indexOf(searchstr);
    }

    @Override
    public long position(Clob searchstr, long start) throws SQLException {
        return 0;
    }

    @Override
    public int setString(long pos, String str) throws SQLException {
        return 0;
    }

    @Override
    public int setString(long pos, String str, int offset, int len) throws SQLException {
        return 0;
    }

    @Override
    public OutputStream setAsciiStream(long pos) throws SQLException {
        return out;
    }

    @Override
    public Writer setCharacterStream(long pos) throws SQLException {
        return null;
    }

    @Override
    public void truncate(long len) throws SQLException {
    }

    @Override
    public void free() throws SQLException {
    }

    @Override
    public Reader getCharacterStream(long pos, long length) throws SQLException {
        return null;
    }
}
