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/*
* Copyright 2015 Open Networking Laboratory
*
* 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 org.onosproject.rest;
import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.util.Enumeration;
import java.util.Iterator;
import java.util.List;
import static com.google.common.base.Preconditions.checkArgument;
/**
* Resource for serving semi-static resources.
*/
public class AbstractInjectionResource extends AbstractWebResource {
/**
* Returns the index into the supplied string where the end of the
* specified pattern is located.
*
* @param string string to split
* @param start index where to start looking for pattern
* @param stopPattern optional pattern where to stop
* @return index where the split should occur
*/
protected int split(String string, int start, String stopPattern) {
int i = stopPattern != null ? string.indexOf(stopPattern, start) : string.length();
checkArgument(i >= 0, "Unable to locate pattern %s", stopPattern);
return i + (stopPattern != null ? stopPattern.length() : 0);
}
/**
* Produces an input stream from the bytes of the specified sub-string.
*
* @param string source string
* @param start index where to start stream
* @param end index where to end stream
* @return input stream
*/
protected InputStream stream(String string, int start, int end) {
return new ByteArrayInputStream(string.substring(start, end).getBytes());
}
/**
* Auxiliary enumeration to sequence input streams.
*/
protected class StreamEnumeration implements Enumeration<InputStream> {
private final Iterator<InputStream> iterator;
public StreamEnumeration(List<InputStream> streams) {
this.iterator = streams.iterator();
}
@Override
public boolean hasMoreElements() {
return iterator.hasNext();
}
@Override
public InputStream nextElement() {
return iterator.next();
}
}
}
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