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/* |
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* Licensed to the Apache Software Foundation (ASF) under one or more |
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* contributor license agreements. See the NOTICE file distributed with |
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* this work for additional information regarding copyright ownership. |
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* The ASF licenses this file to You under the Apache License, Version 2.0 |
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* (the "License"); you may not use this file except in compliance with |
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* the License. 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.types.resources; |
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import java.io.InputStreamReader; |
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import java.io.IOException; |
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import java.io.UnsupportedEncodingException; |
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import java.util.Stack; |
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import java.util.ArrayList; |
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import java.util.Collection; |
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import java.util.Collections; |
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import org.apache.tools.ant.Project; |
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import org.apache.tools.ant.BuildException; |
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import org.apache.tools.ant.types.DataType; |
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import org.apache.tools.ant.types.ResourceCollection; |
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import org.apache.tools.ant.types.resources.StringResource; |
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import org.apache.tools.ant.util.ConcatResourceInputStream; |
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import org.apache.tools.ant.util.LineTokenizer; |
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import org.apache.tools.ant.util.Tokenizer; |
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/** |
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* ResourceCollection consisting of StringResources gathered from tokenizing |
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* another ResourceCollection with a Tokenizer implementation. |
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* @since Ant 1.7 |
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*/ |
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public class Tokens extends BaseResourceCollectionWrapper { |
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private Tokenizer tokenizer; |
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private String encoding; |
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/** |
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* Sort the contained elements. |
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* @return a Collection of Resources. |
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*/ |
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protected synchronized Collection getCollection() { |
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ResourceCollection rc = getResourceCollection(); |
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if (rc.size() == 0) { |
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return Collections.EMPTY_SET; |
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} |
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if (tokenizer == null) { |
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tokenizer = new LineTokenizer(); |
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} |
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ConcatResourceInputStream cat = new ConcatResourceInputStream(rc); |
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cat.setManagingComponent(this); |
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InputStreamReader rdr = null; |
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if (encoding == null) { |
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rdr = new InputStreamReader(cat); |
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} else { |
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try { |
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rdr = new InputStreamReader(cat, encoding); |
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} catch (UnsupportedEncodingException e) { |
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throw new BuildException(e); |
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} |
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} |
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ArrayList result = new ArrayList(); |
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try { |
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for (String s = tokenizer.getToken(rdr); s != null; s = tokenizer.getToken(rdr)) { |
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result.add(new StringResource(s)); |
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} |
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} catch (IOException e) { |
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throw new BuildException("Error reading tokens", e); |
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} |
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return result; |
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} |
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/** |
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* Set the encoding used to create the tokens. |
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* @param encoding the encoding to use. |
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*/ |
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public synchronized void setEncoding(String encoding) { |
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this.encoding = encoding; |
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} |
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/** |
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* Add the nested Tokenizer to this Tokens ResourceCollection. |
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* A LineTokenizer will be used by default. |
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* @param tokenizer the tokenizer to add. |
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*/ |
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public synchronized void add(Tokenizer tokenizer) { |
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if (isReference()) { |
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throw noChildrenAllowed(); |
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} |
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if (this.tokenizer != null) { |
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throw new BuildException("Only one nested tokenizer allowed."); |
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} |
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this.tokenizer = tokenizer; |
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} |
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/** |
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* Overrides the BaseResourceCollectionContainer version |
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* to check the nested Tokenizer. |
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* @param stk the stack of data types to use (recursively). |
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* @param p the project to use to dereference the references. |
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* @throws BuildException on error. |
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*/ |
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protected synchronized void dieOnCircularReference(Stack stk, Project p) |
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throws BuildException { |
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if (isChecked()) { |
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return; |
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} |
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if (isReference()) { |
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super.dieOnCircularReference(stk, p); |
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} else { |
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if (tokenizer instanceof DataType) { |
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stk.push(tokenizer); |
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invokeCircularReferenceCheck((DataType) tokenizer, stk, p); |
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} |
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setChecked(true); |
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} |
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} |
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} |
Matthew Jason Benson