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Add JXPath and a modified Taskdef that uses the 'system path'. 

Remove debugging message.


git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@273175 13f79535-47bb-0310-9956-ffa450edef68
master
Costin Manolache 23 years ago
parent
749486ba91
commit
835adba18c
3 changed files with 499 additions and 1 deletions
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  1. +1
    -1
      proposal/embed/src/java/org/apache/tools/ant/taskdefs/SystemPath.java
  2. +349
    -0
      proposal/embed/src/java/org/apache/tools/ant/taskdefs/Taskdef2.java
  3. +149
    -0
      proposal/embed/src/java/org/apache/tools/ant/taskdefs/optional/JXPath.java

+ 1
- 1
proposal/embed/src/java/org/apache/tools/ant/taskdefs/SystemPath.java View File

@@ -171,7 +171,7 @@ public class SystemPath extends Task {
Class taskClass = acl.loadClass(c.getName());
//project.addTaskDefinition(key, taskClass);
project.getTaskDefinitions().put(key, taskClass);
System.out.println("Loaded " + key + " " + taskClass.getClassLoader() );
//System.out.println("Loaded " + key + " " + taskClass.getClassLoader() );
} catch (NoClassDefFoundError ncdfe) {
log("Could not load a dependent class ("
+ ncdfe.getMessage() + ") for task " + key, Project.MSG_DEBUG);


+ 349
- 0
proposal/embed/src/java/org/apache/tools/ant/taskdefs/Taskdef2.java View File

@@ -0,0 +1,349 @@
/*
* The Apache Software License, Version 1.1
*
* Copyright (c) 2000-2002 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution, if
* any, must include the following acknowlegement:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "The Jakarta Project", "Ant", and "Apache Software
* Foundation" must not be used to endorse or promote products derived
* from this software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache"
* nor may "Apache" appear in their names without prior written
* permission of the Apache Group.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/

package org.apache.tools.ant.taskdefs;

import org.apache.tools.ant.*;
import org.apache.tools.ant.types.*;
import java.io.*;
import java.util.*;

// XXX Had to cut&paste the code in Definer - since most fields are private
// and no accessor is available.

/**
* Special version of taskdef using the configurable ant class loader.
* It will also have additional features ( META-INF/ant.properties ,etc ).
*
*
* @author <a href="stefan.bodewig@epost.de">Stefan Bodewig</a>
* @author Costin Manolache
* @since Ant 1.6
* @ant.task category="internal"
*/
public class Taskdef2 extends Definer {
private String name;
private String value;
private Path classpath;
private File file;
private String resource;
private boolean reverseLoader = false;
private String loaderId = null;
private String classpathId = null;

private static final String REUSE_LOADER_REF = "ant.reuse.loader";

/**
* @deprecated stop using this attribute
* @ant.attribute ignore="true"
*/
public void setReverseLoader(boolean reverseLoader) {
this.reverseLoader = reverseLoader;
log("The reverseloader attribute is DEPRECATED. It will be removed",
Project.MSG_WARN);
}

/**
* Set the classpath to be used when searching for component being defined
*
* @param classpath an Ant Path object containing the classpath.
*/
public void setClasspath(Path classpath) {
if (this.classpath == null) {
this.classpath = classpath;
} else {
this.classpath.append(classpath);
}
}

/**
* Create the classpath to be used when searching for component being defined
*/
public Path createClasspath() {
if (this.classpath == null) {
this.classpath = new Path(getProject());
}
return this.classpath.createPath();
}

/**
* reference to a classpath to use when loading the files.
* To actually share the same loader, set loaderref as well
*/
public void setClasspathRef(Reference r) {
classpathId=r.getRefId();
createClasspath().setRefid(r);
}

/**
* Use the reference to locate the loader. If the loader is not
* found, taskdef will use the specified classpath and register it
* with the specified name.
*
* This allow multiple taskdef/typedef to use the same class loader,
* so they can be used together. It eliminate the need to
* put them in the CLASSPATH.
*
* @since Ant 1.5
*/
public void setLoaderRef(Reference r) {
loaderId = r.getRefId();
}


public void execute() throws BuildException {
AntClassLoader al = createLoader();

if (file == null && resource == null) {

// simple case - one definition
if (name == null || value == null) {
String msg = "name or classname attributes of "
+ getTaskName() + " element "
+ "are undefined";
throw new BuildException(msg);
}
addDefinition(al, name, value);

} else {

InputStream is = null;
try {
if (name != null || value != null) {
String msg = "You must not specify name or value "
+ "together with file or resource.";
throw new BuildException(msg, getLocation());
}

if (file != null && resource != null) {
String msg = "You must not specify both, file and "
+ "resource.";
throw new BuildException(msg, getLocation());
}


Properties props = new Properties();
if (file != null) {
log("Loading definitions from file " + file,
Project.MSG_VERBOSE);
is = new FileInputStream(file);
if (is == null) {
log("Could not load definitions from file " + file
+ ". It doesn\'t exist.", Project.MSG_WARN);
}
}
if (resource != null) {
log("Loading definitions from resource " + resource,
Project.MSG_VERBOSE);
is = al.getResourceAsStream(resource);
if (is == null) {
log("Could not load definitions from resource "
+ resource + ". It could not be found.",
Project.MSG_WARN);
}
}

if (is != null) {
props.load(is);
Enumeration keys = props.keys();
while (keys.hasMoreElements()) {
String n = (String) keys.nextElement();
String v = props.getProperty(n);
addDefinition(al, n, v);
}
}
} catch (IOException ex) {
throw new BuildException(ex, getLocation());
} finally {
if (is != null) {
try {
is.close();
} catch (IOException e) {}
}
}
}
}

/**
* create the classloader then hand the definition off to the subclass;
* @throws BuildException when the class wont load for any reason
*/
private void addDefinition(ClassLoader al, String name, String value)
throws BuildException {
try {
Class c = al.loadClass(value);
AntClassLoader.initializeClass(c);
addDefinition(name, c);
} catch (ClassNotFoundException cnfe) {
String msg = getTaskName() + " class " + value
+ " cannot be found";
throw new BuildException(msg, cnfe, getLocation());
} catch (NoClassDefFoundError ncdfe) {
String msg = getTaskName() + " class " + value
+ " cannot be found";
throw new BuildException(msg, ncdfe, getLocation());
}
}

/**
* create a classloader for this definition
*/
private AntClassLoader createLoader() {
// magic property
if (getProject().getProperty(REUSE_LOADER_REF) != null) {
// Generate the 'reuse' name automatically from the reference.
// This allows <taskdefs> that work on both ant1.4 and ant1.5.
// ( in 1.4 it'll require the task/type to be in classpath if they
// are used togheter ).
if (loaderId == null && classpathId != null) {
loaderId = "ant.loader." + classpathId;
}
}

// If a loader has been set ( either by loaderRef or magic property )
if (loaderId != null) {
Object reusedLoader = getProject().getReference(loaderId);
if (reusedLoader != null) {
if (reusedLoader instanceof AntClassLoader) {
return (AntClassLoader)reusedLoader;
}
// In future the reference object may be the <loader> type
// if( reusedLoader instanceof Loader ) {
// return ((Loader)reusedLoader).getLoader(project);
// }
}
}

AntClassLoader al = (AntClassLoader)project.getReference( "ant.system.loader" );
if( al==null ) {
if (classpath != null) {
al = new AntClassLoader(getProject(), classpath, !reverseLoader);
} else {
al = new AntClassLoader(getProject(), Path.systemClasspath,
!reverseLoader);
}
} else {
if (classpath != null) {
al = new AntClassLoader(al, getProject(), classpath, !reverseLoader);
} else {
al = new AntClassLoader(al, getProject(), Path.systemClasspath,
!reverseLoader);
}
}
// need to load Task via system classloader or the new
// task we want to define will never be a Task but always
// be wrapped into a TaskAdapter.
al.addSystemPackageRoot("org.apache.tools.ant");


// If the loader is new, record it for future uses by other
// task/typedefs
if (loaderId != null) {
if (getProject().getReference(loaderId) == null) {
getProject().addReference(loaderId, al);
}
}

return al;
}

/**
* Name of the property file to load
* ant name/classname pairs from.
*/
public void setFile(File file) {
this.file = file;
}

/**
* Name of the property resource to load
* ant name/classname pairs from.
*/
public void setResource(String res) {
this.resource = res;
}

/**
* Name of the property resource to load
* ant name/classname pairs from.
*/
public void setName(String name) {
this.name = name;
}

/**
* Returns the classname of the object we are defining.
* May be <code>null</code>.
*/
public String getClassname() {
return value;
}

/**
* The full class name of the object being defined.
* Required, unless file or resource have
* been specified.
*/
public void setClassname(String v) {
value = v;
}

/**
* subclassed handler for definitions; called by parent during
* execution.
*/
protected void addDefinition(String name, Class c) throws BuildException {
getProject().addTaskDefinition(name, c);
}
}

+ 149
- 0
proposal/embed/src/java/org/apache/tools/ant/taskdefs/optional/JXPath.java View File

@@ -0,0 +1,149 @@
/*
* The Apache Software License, Version 1.1
*
* Copyright (c) 2000-2002 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution, if
* any, must include the following acknowlegement:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "The Jakarta Project", "Ant", and "Apache Software
* Foundation" must not be used to endorse or promote products derived
* from this software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache"
* nor may "Apache" appear in their names without prior written
* permission of the Apache Group.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/

package org.apache.tools.ant.taskdefs.optional;

import org.apache.tools.ant.*;
import org.apache.tools.ant.types.*;

import java.io.*;
import java.util.*;
import org.xml.sax.Locator;
import org.xml.sax.InputSource;
//import org.xml.sax.HandlerBase;
import org.xml.sax.SAXParseException;
import org.xml.sax.XMLReader;
import org.xml.sax.SAXException;
import org.xml.sax.DocumentHandler;
import org.xml.sax.Attributes;
import org.xml.sax.AttributeList;
import org.xml.sax.helpers.XMLReaderAdapter;
import org.xml.sax.helpers.DefaultHandler;
import org.xml.sax.helpers.AttributeListImpl;

import javax.xml.parsers.SAXParserFactory;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.ParserConfigurationException;

import org.apache.commons.jxpath.*;

// Experimental: need to add code to select the 'root', etc.

/**
* Enable JXPath dynamic properties
*
*
* @author Costin Manolache
*/
public class JXPath extends Task implements PropertyInterceptor {
JXPathContext jxpathCtx;
public JXPath() {
}
public Object getProperty( Project p, String ns, String name ) {
if( ! name.startsWith("jxpath:" ) )
return null;
name=name.substring( 7 );
Object o=jxpathCtx.getValue( name );
//System.out.println("JXPath: getProperty " + ns + " " + name + "=" + o);
if( o==null ) return "null";
return o;
}
public void execute() {
JXPathIntrospector.registerDynamicClass(Hashtable.class, JXPathHashtableHandler.class);

PropertyHelper phelper=PropertyHelper.getPropertyHelper( project );
phelper.addPropertyInterceptor( this );
jxpathCtx=JXPathContext.newContext( project );
}

public static class JXPathHashtableHandler implements DynamicPropertyHandler {

private static final String[] STRING_ARRAY = new String[0];
/**
* Returns string representations of all keys in the map.
*/
public String[] getPropertyNames(Object object){
// System.out.println("getPropertyNames " + object );
Hashtable map = (Hashtable) object;
String names[] = new String[map.size()];
Enumeration it = map.keys();
for (int i = 0; i < names.length; i++){
names[i] = String.valueOf(it.nextElement());
}
return names;
}
/**
* Returns the value for the specified key.
*/
public Object getProperty(Object object, String propertyName) {
// System.out.println("getProperty " + object + " " + propertyName);
return ((Hashtable) object).get(propertyName);
}
/**
* Sets the specified key value.
*/
public void setProperty(Object object, String propertyName, Object value){
((Hashtable)object).put(propertyName, value);
}
}
}

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