com.msopentech.odatajclient.testauthproxy.esigate.LinkRewriteRenderer.java Source code

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Here is the source code for com.msopentech.odatajclient.testauthproxy.esigate.LinkRewriteRenderer.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 com.msopentech.odatajclient.testauthproxy.esigate;

import java.io.IOException;
import java.io.Writer;
import org.apache.http.HttpEntityEnclosingRequest;
import org.esigate.Renderer;

public class LinkRewriteRenderer implements Renderer {

    private static final char SLASH = '/';

    private String baseUrl;

    private String replacementUrl;

    public LinkRewriteRenderer(final String baseUrl, final String visibleBaseUrl) {
        if (visibleBaseUrl == null || visibleBaseUrl.isEmpty()) {
            throw new IllegalArgumentException("Need to specify baseUrl and visibleBaseUrl");
        }

        this.baseUrl = removeLeadingSlash(baseUrl);
        this.replacementUrl = removeLeadingSlash(visibleBaseUrl);
    }

    private String removeLeadingSlash(final String src) {
        final int lastCharPosition = src.length() - 1;
        return src.charAt(lastCharPosition) == SLASH ? src.substring(0, lastCharPosition) : src;
    }

    @Override
    public void render(final HttpEntityEnclosingRequest httpRequest, final String src, final Writer out)
            throws IOException {

        out.write(src.replaceAll(baseUrl, replacementUrl));
    }
}