| /* |
| * 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.InputStreamReader; |
| import java.io.IOException; |
| import java.io.UnsupportedEncodingException; |
| import java.util.Stack; |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.Collections; |
| |
| import org.apache.tools.ant.Project; |
| import org.apache.tools.ant.BuildException; |
| import org.apache.tools.ant.types.DataType; |
| import org.apache.tools.ant.types.ResourceCollection; |
| import org.apache.tools.ant.util.ConcatResourceInputStream; |
| import org.apache.tools.ant.util.LineTokenizer; |
| import org.apache.tools.ant.util.Tokenizer; |
| |
| /** |
| * ResourceCollection consisting of StringResources gathered from tokenizing |
| * another ResourceCollection with a Tokenizer implementation. |
| * @since Ant 1.7 |
| */ |
| public class Tokens extends BaseResourceCollectionWrapper { |
| |
| private Tokenizer tokenizer; |
| private String encoding; |
| |
| /** |
| * Sort the contained elements. |
| * @return a Collection of Resources. |
| */ |
| protected synchronized Collection getCollection() { |
| ResourceCollection rc = getResourceCollection(); |
| if (rc.size() == 0) { |
| return Collections.EMPTY_SET; |
| } |
| if (tokenizer == null) { |
| tokenizer = new LineTokenizer(); |
| } |
| ConcatResourceInputStream cat = new ConcatResourceInputStream(rc); |
| cat.setManagingComponent(this); |
| |
| InputStreamReader rdr = null; |
| if (encoding == null) { |
| rdr = new InputStreamReader(cat); |
| } else { |
| try { |
| rdr = new InputStreamReader(cat, encoding); |
| } catch (UnsupportedEncodingException e) { |
| throw new BuildException(e); |
| } |
| } |
| ArrayList result = new ArrayList(); |
| try { |
| for (String s = tokenizer.getToken(rdr); s != null; s = tokenizer.getToken(rdr)) { |
| StringResource resource = new StringResource(s); |
| resource.setProject(getProject()); |
| result.add(resource); |
| } |
| } catch (IOException e) { |
| throw new BuildException("Error reading tokens", e); |
| } |
| return result; |
| } |
| |
| /** |
| * Set the encoding used to create the tokens. |
| * @param encoding the encoding to use. |
| */ |
| public synchronized void setEncoding(String encoding) { |
| this.encoding = encoding; |
| } |
| |
| /** |
| * Add the nested Tokenizer to this Tokens ResourceCollection. |
| * A LineTokenizer will be used by default. |
| * @param tokenizer the tokenizer to add. |
| */ |
| public synchronized void add(Tokenizer tokenizer) { |
| if (isReference()) { |
| throw noChildrenAllowed(); |
| } |
| if (this.tokenizer != null) { |
| throw new BuildException("Only one nested tokenizer allowed."); |
| } |
| this.tokenizer = tokenizer; |
| } |
| |
| /** |
| * Overrides the BaseResourceCollectionContainer version |
| * to check the nested Tokenizer. |
| * @param stk the stack of data types to use (recursively). |
| * @param p the project to use to dereference the references. |
| * @throws BuildException on error. |
| */ |
| protected synchronized void dieOnCircularReference(Stack stk, Project p) |
| throws BuildException { |
| if (isChecked()) { |
| return; |
| } |
| if (isReference()) { |
| super.dieOnCircularReference(stk, p); |
| } else { |
| if (tokenizer instanceof DataType) { |
| stk.push(tokenizer); |
| invokeCircularReferenceCheck((DataType) tokenizer, stk, p); |
| } |
| setChecked(true); |
| } |
| } |
| |
| } |