/*
* 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 org.apache.sling.scripting.xproc.xpl.impl;
import java.io.IOException;
import java.io.OutputStream;
import javax.xml.namespace.QName;
import org.apache.cocoon.pipeline.NonCachingPipeline;
import org.apache.cocoon.pipeline.component.sax.AbstractGenerator;
import org.apache.cocoon.pipeline.component.sax.XMLSerializer;
import org.apache.sling.scripting.xproc.cocoon.generator.SlingGenerator;
import org.apache.sling.scripting.xproc.xpl.XplConstants;
import org.apache.sling.scripting.xproc.xpl.api.Pipeline;
import org.apache.sling.scripting.xproc.xpl.api.Step;
public class PipelineImpl extends AbstractCompoundStepImpl implements Pipeline {
@Override
public void eval() throws Exception {
try {
this.getEnv().setCcPipeline(new NonCachingPipeline());
// generator
AbstractGenerator generator = new SlingGenerator(this.getEnv().getSling());
this.getEnv().getCcPipeline().addComponent(generator);
// subpipeline evaluated
for (Step step : this.getSubpipeline()) {
step.eval();
}
this.getEnv().getCcPipeline().addComponent(new XMLSerializer());
// Don't retrieve OutputStream from response until actually writing
// to response, so that error handlers can retrieve it without getting
// an error
final OutputStream out = new OutputStreamWrapper() {
@Override
protected OutputStream getWrappedStream() throws IOException {
return getEnv().getSling().getResponse().getOutputStream();
}
};
this.getEnv().getCcPipeline().setup(out);
this.getEnv().getCcPipeline().execute();
} catch (Exception e) {
String absPath = this.getEnv().getSling().getRequest().getResource().getPath();
throw new Exception("Error in pipeline for resource: " + absPath, e);
}
}
@Override
public QName getQName() {
return XplConstants.QNAME_PIPELINE;
}
}