com.esri.gpt.control.webharvest.client.waf.WafFile.java Source code

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Here is the source code for com.esri.gpt.control.webharvest.client.waf.WafFile.java

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/* See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * Esri Inc. 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.esri.gpt.control.webharvest.client.waf;

import com.esri.gpt.framework.resource.api.SourceUri;
import com.esri.gpt.framework.resource.common.CommonPublishable;
import com.esri.gpt.framework.resource.common.UrlUri;
import com.esri.gpt.framework.util.Val;
import java.io.IOException;
import java.util.Date;
import org.apache.commons.httpclient.URIException;
import org.apache.commons.httpclient.util.URIUtil;

/**
 * WAF file.
 */
class WafFile extends CommonPublishable {
    private UrlUri uri;
    private WafProxy proxy;
    private WafProxy.Content content;
    private IOException storedException;
    private String encodedUrl;

    public WafFile(WafProxy proxy, String url) {
        this.proxy = proxy;
        this.uri = new UrlUri(url);
        this.encodedUrl = encode(url);
    }

    @Override
    public SourceUri getSourceUri() {
        return uri;
    }

    @Override
    public String getContent() throws IOException {
        // rethrow stored exception which occured during getUpdateDate()
        if (storedException != null) {
            throw storedException;
        }
        if (content == null) {
            content = proxy.readContent(encodedUrl);
        }
        String metadata = "";
        if (content != null) {
            metadata = Val.chkStr(content.getText());
            content = null;
        }
        return metadata;
    }

    @Override
    public Date getUpdateDate() {
        try {
            if (content == null) {
                content = proxy.readContent(encodedUrl);
            }
        } catch (IOException ex) {
            // store that exception here because getUpdateDate can not throw any exception by interface
            // instead getContent() would rethrow this exception
            storedException = ex;
        }
        return content != null ? content.getLastModifedDate() : null;
    }

    private String encode(String url) {
        url = Val.chkStr(url);
        try {
            return URIUtil.encodePathQuery(URIUtil.decode(url, "UTF-8"), "UTF-8");
        } catch (URIException ex) {
            return url;
        }
    }
}