/*
* 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.cocoon.template.instruction;
import java.util.Stack;
import org.apache.cocoon.components.expression.ExpressionContext;
import org.apache.cocoon.template.environment.ExecutionContext;
import org.apache.cocoon.template.environment.ParsingContext;
import org.apache.cocoon.template.expression.JXTExpression;
import org.apache.cocoon.template.script.Invoker;
import org.apache.cocoon.template.script.event.Event;
import org.apache.cocoon.template.script.event.StartElement;
import org.apache.cocoon.xml.XMLConsumer;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.Attributes;
import org.xml.sax.Locator;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
/**
* @version SVN $Id: Set.java 449189 2006-09-23 06:52:29Z crossley $
*/
public class Set extends Instruction {
private final JXTExpression var;
private final JXTExpression value;
public Set(ParsingContext parsingContext, StartElement raw, Attributes attrs, Stack stack)
throws SAXException {
super(raw);
Locator locator = getLocation();
String var = attrs.getValue("var");
String value = attrs.getValue("value");
JXTExpression varExpr = null;
JXTExpression valueExpr = null;
if (var != null) {
varExpr = parsingContext.getStringTemplateParser().compileExpr(var, "set: \"var\":", locator);
}
if (value != null) {
valueExpr = parsingContext.getStringTemplateParser().compileExpr(value, "set: \"value\":", locator);
}
this.var = varExpr;
this.value = valueExpr;
}
public Event execute(final XMLConsumer consumer,
ExpressionContext expressionContext, ExecutionContext executionContext,
MacroContext macroContext, Event startEvent, Event endEvent)
throws SAXException {
Object value = null;
String var = null;
try {
if (this.var != null) {
var = this.var.getStringValue(expressionContext);
}
if (this.value != null) {
value = this.value.getNode(expressionContext);
}
} catch (Exception exc) {
throw new SAXParseException(exc.getMessage(), getLocation(), exc);
}
if (this.value == null) {
NodeList nodeList =
Invoker.toDOMNodeList("set", this,
expressionContext, executionContext,
macroContext);
// JXPath doesn't handle NodeList, so convert it to an array
int len = nodeList.getLength();
Node[] nodeArr = new Node[len];
for (int i = 0; i < len; i++) {
nodeArr[i] = nodeList.item(i);
}
value = nodeArr;
}
if (var != null) {
expressionContext.put(var, value);
}
return getEndInstruction().getNext();
}
}