/*
* Copyright 2011 Esri.
*
* 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.esri.gpt.control.webharvest.client.thredds;
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;
/**
* THREDDS file.
*/
class TFile extends CommonPublishable {
private UrlUri uri;
private TProxy proxy;
private TProxy.Content content;
private IOException storedException;
public TFile(TProxy proxy, String url) {
this.proxy = proxy;
this.uri = new UrlUri(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(getSourceUri().asString());
}
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(getSourceUri().asString());
}
} 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;
}
}