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A collection of classes shared by broadleaf profile, cms, admin, and core.
/*
* #%L
* BroadleafCommerce Common Libraries
* %%
* Copyright (C) 2009 - 2013 Broadleaf Commerce
* %%
* 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.
* #L%
*/
package org.broadleafcommerce.common.extensibility.context.merge;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.broadleafcommerce.common.extensibility.context.ResourceInputStream;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Collection;
/**
* This class serves as a basic iterator for a list of source files to be
* merged. The interesting part, however, is that additional resources
* may be inserted at any time at the current iterator position.
*
* @author Jeff Fischer
*/
public class DynamicResourceIterator extends ArrayList {
private static final Log LOG = LogFactory.getLog(DynamicResourceIterator.class);
private int position = 0;
private int embeddedInsertPosition = 0;
public ResourceInputStream nextResource() {
ResourceInputStream ris = get(position);
position++;
embeddedInsertPosition = position;
return ris;
}
public int getPosition() {
return position;
}
public void addEmbeddedResource(ResourceInputStream ris) {
if (embeddedInsertPosition == size()) {
add(ris);
} else {
add(embeddedInsertPosition, ris);
}
embeddedInsertPosition++;
}
public boolean hasNext() {
return position < size();
}
@Override
public boolean add(ResourceInputStream resourceInputStream) {
byte[] sourceArray;
try {
sourceArray = buildArrayFromStream(resourceInputStream);
} catch (IOException e) {
throw new RuntimeException(e);
}
ResourceInputStream ris = new ResourceInputStream(new ByteArrayInputStream(sourceArray), null, resourceInputStream.getNames());
return super.add(ris);
}
@Override
public boolean addAll(Collection c) {
for (ResourceInputStream ris : c) {
if (!add(ris)) {
return false;
}
}
return true;
}
@Override
public void add(int index, ResourceInputStream resourceInputStream) {
byte[] sourceArray;
try {
sourceArray = buildArrayFromStream(resourceInputStream);
} catch (IOException e) {
throw new RuntimeException(e);
}
ResourceInputStream ris = new ResourceInputStream(new ByteArrayInputStream(sourceArray), null, resourceInputStream.getNames());
super.add(index, ris);
}
protected byte[] buildArrayFromStream(InputStream source) throws IOException {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
boolean eof = false;
try{
while (!eof) {
int temp = source.read();
if (temp == -1) {
eof = true;
} else {
baos.write(temp);
}
}
} finally {
try{ source.close(); } catch (Throwable e) {
LOG.error("Unable to merge source and patch locations", e);
}
}
return baos.toByteArray();
}
}