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@@ -0,0 +1,92 @@ |
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/* |
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* Copyright 2005 The Apache Software Foundation |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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* |
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*/ |
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package org.apache.tools.ant.taskdefs.condition; |
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import java.io.IOException; |
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import java.util.Iterator; |
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import org.apache.tools.ant.BuildException; |
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import org.apache.tools.ant.types.Resource; |
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import org.apache.tools.ant.types.ResourceCollection; |
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import org.apache.tools.ant.types.resources.Union; |
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import org.apache.tools.ant.util.ResourceUtils; |
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/** |
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* Compares resources for equality based on size and content. |
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* All resources specified must match; no resource collections |
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* specified is an error condition; if resource collections are |
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* specified, but yield fewer than two elements, the condition |
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* evaluates to <code>true</code>. |
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* @since Ant 1.7 |
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*/ |
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public class ResourcesMatch implements Condition { |
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private Union resources = null; |
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private boolean asText = false; |
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/** |
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* Set whether to treat resources as if they were text files, |
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* ignoring line endings. |
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* @param astext whether to ignore line endings. |
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*/ |
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public void setAsText(boolean asText) { |
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this.asText = asText; |
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} |
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/** |
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* Add a resource collection. |
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* @param rc the resource collection to add. |
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*/ |
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public void add(ResourceCollection rc) { |
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if (rc == null) { |
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return; |
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} |
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resources = resources == null ? new Union() : resources; |
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resources.add(rc); |
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} |
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/** |
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* Verify that all resources match. |
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* @return true if all resources are equal. |
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* @exception BuildException if there is an error. |
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*/ |
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public boolean eval() throws BuildException { |
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if (resources == null) { |
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throw new BuildException( |
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"You must specify one or more nested resource collections"); |
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} |
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if (resources.size() > 1) { |
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Iterator i = resources.iterator(); |
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Resource r1 = (Resource) i.next(); |
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Resource r2 = null; |
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while (i.hasNext()) { |
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r2 = (Resource) i.next(); |
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try { |
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if (!ResourceUtils.contentEquals(r1, r2, asText)) { |
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return false; |
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} |
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} catch (IOException ioe) { |
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throw new BuildException("when comparing resources " |
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+ r1.toString() + " and " + r2.toString(), ioe); |
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} |
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r1 = r2; |
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} |
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} |
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return true; |
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} |
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} |
Matthew Jason Benson