org.apache.wicket.util.resource.StringBufferResourceStream.java Source code

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Here is the source code for org.apache.wicket.util.resource.StringBufferResourceStream.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.apache.wicket.util.resource;

import org.apache.wicket.util.string.AppendingStringBuffer;
import org.apache.wicket.util.time.Time;

/**
 * A string resource that can be appended to.
 * 
 * @author Jonathan Locke
 */
public class StringBufferResourceStream extends AbstractStringResourceStream {
    private static final long serialVersionUID = 1L;

    /** Stylesheet information */
    private final AppendingStringBuffer buffer = new AppendingStringBuffer(128);

    /**
     * Constructor.
     */
    public StringBufferResourceStream() {
    }

    /**
     * Constructor.
     * 
     * @param contentType
     *            The mime type of this resource, such as "image/jpeg" or "text/html"
     */
    public StringBufferResourceStream(final String contentType) {
        super(contentType);
    }

    /**
     * Adds to this string buffer resource
     * 
     * @param s
     *            The string to add
     * @return this for chaining
     */
    public StringBufferResourceStream append(final CharSequence s) {
        buffer.append(s);
        setLastModified(Time.now());
        return this;
    }

    /**
     * Prepends to this string buffer resource
     * 
     * @param s
     *            The string to prepend
     * @return this for chaining
     */
    public StringBufferResourceStream prepend(final CharSequence s) {
        buffer.insert(0, s);
        setLastModified(Time.now());
        return this;
    }

    /**
     * Clears the string buffer resource.
     * 
     * @return this for chaining
     */
    public StringBufferResourceStream clear() {
        buffer.delete(0, buffer.length());
        return this;
    }

    /**
     * @see org.apache.wicket.util.resource.AbstractStringResourceStream#getString()
     */
    @Override
    protected String getString() {
        return buffer.toString();
    }
}