diff options
Diffstat (limited to 'framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/taskdefs/WhichResource.java')
| -rw-r--r-- | framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/taskdefs/WhichResource.java | 199 |
1 files changed, 199 insertions, 0 deletions
diff --git a/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/taskdefs/WhichResource.java b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/taskdefs/WhichResource.java new file mode 100644 index 00000000..3f315a8d --- /dev/null +++ b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/taskdefs/WhichResource.java @@ -0,0 +1,199 @@ +/* + * 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.taskdefs; + +import java.net.URL; + +import org.apache.tools.ant.AntClassLoader; +import org.apache.tools.ant.BuildException; +import org.apache.tools.ant.Project; +import org.apache.tools.ant.Task; +import org.apache.tools.ant.types.Path; +import org.apache.tools.ant.types.Reference; + +/** + * Find a class or resource on the supplied classpath, or the + * system classpath if none is supplied. The named property is set if + * the item can be found. For example + * <pre> + * <whichresource resource="/log4j.properties" + * property="log4j.url" > + * </pre> + * @since Ant 1.6 + * @ant.attribute.group name="oneof" description="Exactly one of these two" + */ +public class WhichResource extends Task { + /** + * our classpath + */ + private Path classpath; + + /** + * class to look for + */ + private String classname; + + /** + * resource to look for + */ + private String resource; + + /** + * property to set + */ + private String property; + + + /** + * Set the classpath to be used for this compilation. + * @param cp the classpath to be used. + */ + public void setClasspath(Path cp) { + if (classpath == null) { + classpath = cp; + } else { + classpath.append(cp); + } + } + + /** + * Adds a path to the classpath. + * @return a classpath to be configured. + */ + public Path createClasspath() { + if (classpath == null) { + classpath = new Path(getProject()); + } + return classpath.createPath(); + } + + /** + * Set the classpath to use by reference. + * + * @param r a reference to an existing classpath. + * @since Ant 1.7.1 + */ + public void setClasspathRef(Reference r) { + createClasspath().setRefid(r); + } + + /** + * validate + */ + private void validate() { + int setcount = 0; + if (classname != null) { + setcount++; + } + if (resource != null) { + setcount++; + } + + + if (setcount == 0) { + throw new BuildException("One of classname or resource must" + + " be specified"); + } + if (setcount > 1) { + throw new BuildException("Only one of classname or resource can" + + " be specified"); + } + if (property == null) { + throw new BuildException("No property defined"); + } + } + + /** + * execute it + * @throws BuildException on error + */ + public void execute() throws BuildException { + validate(); + if (classpath != null) { + classpath = classpath.concatSystemClasspath("ignore"); + getProject().log("using user supplied classpath: " + classpath, + Project.MSG_DEBUG); + } else { + classpath = new Path(getProject()); + classpath = classpath.concatSystemClasspath("only"); + getProject().log("using system classpath: " + classpath, + Project.MSG_DEBUG); + } + AntClassLoader loader = null; + try { + loader = AntClassLoader.newAntClassLoader(getProject().getCoreLoader(), + getProject(), + classpath, false); + String loc = null; + if (classname != null) { + //convert a class name into a resource + resource = classname.replace('.', '/') + ".class"; + } + + if (resource == null) { + throw new BuildException("One of class or resource is required"); + } + + if (resource.startsWith("/")) { + resource = resource.substring(1); + } + + log("Searching for " + resource, Project.MSG_VERBOSE); + URL url; + url = loader.getResource(resource); + if (url != null) { + //set the property + loc = url.toExternalForm(); + getProject().setNewProperty(property, loc); + } + } finally { + if (loader != null) { + loader.cleanup(); + } + } + } + + /** + * name the resource to look for + * @param resource the name of the resource to look for. + * @ant.attribute group="oneof" + */ + public void setResource(String resource) { + this.resource = resource; + } + + /** + * name the class to look for + * @param classname the name of the class to look for. + * @ant.attribute group="oneof" + */ + public void setClass(String classname) { + this.classname = classname; + } + + /** + * the property to fill with the URL of the resource or class + * @param property the property to be set. + * @ant.attribute group="required" + */ + public void setProperty(String property) { + this.property = property; + } + +} |