| /* |
| * 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 |
| * |
| * https://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.InputStreamReader; |
| import java.nio.charset.Charset; |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.Stack; |
| |
| import org.apache.tools.ant.BuildException; |
| import org.apache.tools.ant.Project; |
| import org.apache.tools.ant.types.DataType; |
| import org.apache.tools.ant.types.Resource; |
| 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<Resource> getCollection() { |
| ResourceCollection rc = getResourceCollection(); |
| if (rc.isEmpty()) { |
| return Collections.emptySet(); |
| } |
| if (tokenizer == null) { |
| tokenizer = new LineTokenizer(); |
| } |
| try (ConcatResourceInputStream cat = new ConcatResourceInputStream(rc); |
| InputStreamReader rdr = new InputStreamReader(cat, |
| encoding == null ? Charset.defaultCharset() |
| : Charset.forName(encoding))) { |
| cat.setManagingComponent(this); |
| List<Resource> result = new ArrayList<>(); |
| for (String s = tokenizer.getToken(rdr); s != null; s = |
| tokenizer.getToken(rdr)) { |
| // do not send the Project to the constructor of StringResource, since |
| // the semantics of that constructor clearly state that property value |
| // replacement takes place on the passed string value. We don't want |
| // that to happen. |
| final StringResource resource = new StringResource(s); |
| resource.setProject(getProject()); |
| result.add(resource); |
| } |
| return result; |
| } catch (IOException e) { |
| throw new BuildException("Error reading tokens", e); |
| } |
| } |
| |
| /** |
| * 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; |
| setChecked(false); |
| } |
| |
| /** |
| * 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. |
| */ |
| @Override |
| protected synchronized void dieOnCircularReference(Stack<Object> stk, Project p) |
| throws BuildException { |
| if (isChecked()) { |
| return; |
| } |
| |
| // check nested collection |
| super.dieOnCircularReference(stk, p); |
| |
| if (!isReference()) { |
| if (tokenizer instanceof DataType) { |
| pushAndInvokeCircularReferenceCheck((DataType) tokenizer, stk, |
| p); |
| } |
| setChecked(true); |
| } |
| } |
| |
| } |