Source Code Cross Referenced for DefBase.java in  » Build » ANT » org » apache » tools » ant » taskdefs » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Build » ANT » org.apache.tools.ant.taskdefs 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         *  Licensed to the Apache Software Foundation (ASF) under one or more
003:         *  contributor license agreements.  See the NOTICE file distributed with
004:         *  this work for additional information regarding copyright ownership.
005:         *  The ASF licenses this file to You under the Apache License, Version 2.0
006:         *  (the "License"); you may not use this file except in compliance with
007:         *  the License.  You may obtain a copy of the License at
008:         *
009:         *      http://www.apache.org/licenses/LICENSE-2.0
010:         *
011:         *  Unless required by applicable law or agreed to in writing, software
012:         *  distributed under the License is distributed on an "AS IS" BASIS,
013:         *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014:         *  See the License for the specific language governing permissions and
015:         *  limitations under the License.
016:         *
017:         */
018:
019:        package org.apache.tools.ant.taskdefs;
020:
021:        import org.apache.tools.ant.AntClassLoader;
022:        import org.apache.tools.ant.BuildException;
023:        import org.apache.tools.ant.Project;
024:        import org.apache.tools.ant.types.Path;
025:        import org.apache.tools.ant.types.Reference;
026:        import org.apache.tools.ant.util.ClasspathUtils;
027:
028:        /**
029:         * Base class for Definitions handling uri and class loading.
030:         * (This was part of Definer)
031:         *
032:         * @since Ant 1.6
033:         */
034:        public abstract class DefBase extends AntlibDefinition {
035:            private ClassLoader createdLoader;
036:            private ClasspathUtils.Delegate cpDelegate;
037:
038:            /**
039:             * Check if classpath attributes have been set.
040:             * (to be called before getCpDelegate() is used.
041:             * @return true if cpDelegate has been created.
042:             */
043:            protected boolean hasCpDelegate() {
044:                return cpDelegate != null;
045:            }
046:
047:            /**
048:             * @param reverseLoader if true a delegated loader will take precedence over
049:             *                      the parent
050:             * @deprecated since 1.6.x.
051:             *             stop using this attribute
052:             * @ant.attribute ignore="true"
053:             */
054:            public void setReverseLoader(boolean reverseLoader) {
055:                getDelegate().setReverseLoader(reverseLoader);
056:                log(
057:                        "The reverseloader attribute is DEPRECATED. It will be removed",
058:                        Project.MSG_WARN);
059:            }
060:
061:            /**
062:             * @return the classpath for this definition
063:             */
064:            public Path getClasspath() {
065:                return getDelegate().getClasspath();
066:            }
067:
068:            /**
069:             * @return the reverse loader attribute of the classpath delegate.
070:             */
071:            public boolean isReverseLoader() {
072:                return getDelegate().isReverseLoader();
073:            }
074:
075:            /**
076:             * Returns the loader id of the class path Delegate.
077:             * @return the loader id
078:             */
079:            public String getLoaderId() {
080:                return getDelegate().getClassLoadId();
081:            }
082:
083:            /**
084:             * Returns the class path id of the class path delegate.
085:             * @return the class path id
086:             */
087:            public String getClasspathId() {
088:                return getDelegate().getClassLoadId();
089:            }
090:
091:            /**
092:             * Set the classpath to be used when searching for component being defined.
093:             *
094:             * @param classpath an Ant Path object containing the classpath.
095:             */
096:            public void setClasspath(Path classpath) {
097:                getDelegate().setClasspath(classpath);
098:            }
099:
100:            /**
101:             * Create the classpath to be used when searching for component being
102:             * defined.
103:             * @return the classpath of the this definition
104:             */
105:            public Path createClasspath() {
106:                return getDelegate().createClasspath();
107:            }
108:
109:            /**
110:             * Set a reference to a classpath to use when loading the files.
111:             * To actually share the same loader, set loaderref as well
112:             * @param r the reference to the classpath
113:             */
114:            public void setClasspathRef(Reference r) {
115:                getDelegate().setClasspathref(r);
116:            }
117:
118:            /**
119:             * Use the reference to locate the loader. If the loader is not
120:             * found, the specified classpath will be used and registered
121:             * with the specified name.
122:             *
123:             * This allows multiple taskdef/typedef to use the same class loader,
124:             * so they can be used together, eliminating the need to
125:             * put them in the CLASSPATH.
126:             *
127:             * @param r the reference to locate the loader.
128:             * @since Ant 1.5
129:             */
130:            public void setLoaderRef(Reference r) {
131:                getDelegate().setLoaderRef(r);
132:            }
133:
134:            /**
135:             * create a classloader for this definition
136:             * @return the classloader from the cpDelegate
137:             */
138:            protected ClassLoader createLoader() {
139:                if (getAntlibClassLoader() != null && cpDelegate == null) {
140:                    return getAntlibClassLoader();
141:                }
142:                if (createdLoader == null) {
143:                    createdLoader = getDelegate().getClassLoader();
144:                    // need to load Task via system classloader or the new
145:                    // task we want to define will never be a Task but always
146:                    // be wrapped into a TaskAdapter.
147:                    ((AntClassLoader) createdLoader)
148:                            .addSystemPackageRoot("org.apache.tools.ant");
149:                }
150:                return createdLoader;
151:            }
152:
153:            /**
154:             * @see org.apache.tools.ant.Task#init()
155:             * @throws BuildException on error.
156:             * @since Ant 1.6
157:             */
158:            public void init() throws BuildException {
159:                super .init();
160:            }
161:
162:            private ClasspathUtils.Delegate getDelegate() {
163:                if (cpDelegate == null) {
164:                    cpDelegate = ClasspathUtils.getDelegate(this);
165:                }
166:                return cpDelegate;
167:            }
168:        }
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