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Ant example source code file (PropertyResource.java)
The PropertyResource.java source code/* * 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.resources; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.io.ByteArrayInputStream; import org.apache.tools.ant.Project; import org.apache.tools.ant.types.Resource; import org.apache.tools.ant.util.PropertyOutputStream; /** * Exposes an Ant property as a Resource. * @since Ant 1.7 */ public class PropertyResource extends Resource { /** Magic number */ private static final int PROPERTY_MAGIC = Resource.getMagicNumber("PropertyResource".getBytes()); private static final InputStream UNSET = new InputStream() { public int read() { return -1; } }; /** * Default constructor. */ public PropertyResource() { } /** * Construct a new PropertyResource with the specified name. * @param p the project to use. * @param n the String name of this PropertyResource (Ant property name/key). */ public PropertyResource(Project p, String n) { super(n); setProject(p); } /** * Get the value of this PropertyResource. * @return the value of the specified Property. */ public String getValue() { Project p = getProject(); return p == null ? null : p.getProperty(getName()); } /** * Find out whether this Resource exists. * @return true if the Property is set, false otherwise. */ public boolean isExists() { return getValue() != null; } /** * Get the size of this Resource. * @return the size, as a long, 0 if the Resource does not exist (for * compatibility with java.io.File), or UNKNOWN_SIZE if not known. */ public long getSize() { if (isReference()) { return ((Resource) getCheckedRef()).getSize(); } return isExists() ? (long) getValue().length() : 0L; } /** * Get the hash code for this Resource. * @return hash code as int. */ public int hashCode() { if (isReference()) { return getCheckedRef().hashCode(); } return super.hashCode() * PROPERTY_MAGIC; } /** * Get the string. * * @return the string contents of the resource. * @since Ant 1.7 */ public String toString() { if (isReference()) { return getCheckedRef().toString(); } return String.valueOf(getValue()); } /** * Get an InputStream for the Resource. * @return an InputStream containing this Resource's content. * @throws IOException if unable to provide the content of this * Resource as a stream. * @throws UnsupportedOperationException if InputStreams are not * supported for this Resource type. */ public InputStream getInputStream() throws IOException { if (isReference()) { return ((Resource) getCheckedRef()).getInputStream(); } return isExists() ? new ByteArrayInputStream(getValue().getBytes()) : UNSET; } /** * Get an OutputStream for the Resource. * @return an OutputStream to which content can be written. * @throws IOException if unable to provide the content of this * Resource as a stream. * @throws UnsupportedOperationException if OutputStreams are not * supported for this Resource type. */ public OutputStream getOutputStream() throws IOException { if (isReference()) { return ((Resource) getCheckedRef()).getOutputStream(); } if (isExists()) { throw new ImmutableResourceException(); } return new PropertyOutputStream(getProject(), getName()); } } Other Ant examples (source code examples)Here is a short list of links related to this Ant PropertyResource.java source code file: |
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