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/*
* 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.tools.ant.types;
import java.util.Stack;
import java.util.Vector;
import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.Project;
/**
* An AntFilterReader is a wrapper class that encloses the classname
* and configuration of a Configurable FilterReader.
*/
public final class AntFilterReader
extends DataType implements Cloneable {
private String className;
private final Vector<Parameter> parameters = new Vector<Parameter>();
private Path classpath;
/**
* Set the className attribute.
*
* @param className a <code>String</code> value
*/
public void setClassName(final String className) {
if (isReference()) {
throw tooManyAttributes();
}
this.className = className;
}
/**
* Get the className attribute.
*
* @return a <code>String</code> value
*/
public String getClassName() {
if (isReference()) {
return ((AntFilterReader) getCheckedRef()).getClassName();
}
dieOnCircularReference();
return className;
}
/**
* Add a Parameter.
*
* @param param a <code>Parameter</code> value
*/
public void addParam(final Parameter param) {
if (isReference()) {
throw noChildrenAllowed();
}
parameters.addElement(param);
}
/**
* Set the classpath to load the FilterReader through (attribute).
* @param classpath a classpath
*/
public void setClasspath(Path classpath) {
if (isReference()) {
throw tooManyAttributes();
}
if (this.classpath == null) {
this.classpath = classpath;
} else {
this.classpath.append(classpath);
}
setChecked(false);
}
/**
* Set the classpath to load the FilterReader through (nested element).
* @return a classpath to be configured
*/
public Path createClasspath() {
if (isReference()) {
throw noChildrenAllowed();
}
if (this.classpath == null) {
this.classpath = new Path(getProject());
}
setChecked(false);
return this.classpath.createPath();
}
/**
* Get the classpath.
* @return the classpath
*/
public Path getClasspath() {
if (isReference()) {
((AntFilterReader) getCheckedRef()).getClasspath();
}
dieOnCircularReference();
return classpath;
}
/**
* Set the classpath to load the FilterReader through via
* reference (attribute).
* @param r a reference to a classpath
*/
public void setClasspathRef(Reference r) {
if (isReference()) {
throw tooManyAttributes();
}
createClasspath().setRefid(r);
}
/**
* The parameters for this filter.
*
* @return a <code>Parameter[]</code> value
*/
public Parameter[] getParams() {
if (isReference()) {
((AntFilterReader) getCheckedRef()).getParams();
}
dieOnCircularReference();
Parameter[] params = new Parameter[parameters.size()];
parameters.copyInto(params);
return params;
}
/**
* Makes this instance in effect a reference to another AntFilterReader
* instance.
*
* <p>You must not set another attribute or nest elements inside
* this element if you make it a reference.</p>
*
* @param r the reference to which this instance is associated
* @exception BuildException if this instance already has been configured.
*/
public void setRefid(Reference r) throws BuildException {
if (!parameters.isEmpty() || className != null
|| classpath != null) {
throw tooManyAttributes();
}
super.setRefid(r);
}
protected synchronized void dieOnCircularReference(Stack<Object> stk, Project p)
throws BuildException {
if (isChecked()) {
return;
}
if (isReference()) {
super.dieOnCircularReference(stk, p);
} else {
if (classpath != null) {
pushAndInvokeCircularReferenceCheck(classpath, stk, p);
}
setChecked(true);
}
}
}
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