diff options
Diffstat (limited to 'framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/types/resources/ResourceList.java')
| -rw-r--r-- | framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/types/resources/ResourceList.java | 239 |
1 files changed, 239 insertions, 0 deletions
diff --git a/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/types/resources/ResourceList.java b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/types/resources/ResourceList.java new file mode 100644 index 00000000..8b77e1bb --- /dev/null +++ b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/types/resources/ResourceList.java @@ -0,0 +1,239 @@ +/* + * 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.BufferedInputStream; +import java.io.BufferedReader; +import java.io.IOException; +import java.io.InputStreamReader; +import java.io.Reader; +import java.util.ArrayList; +import java.util.Iterator; +import java.util.Stack; +import java.util.Vector; + +import org.apache.tools.ant.BuildException; +import org.apache.tools.ant.Project; +import org.apache.tools.ant.PropertyHelper; +import org.apache.tools.ant.filters.util.ChainReaderHelper; +import org.apache.tools.ant.types.DataType; +import org.apache.tools.ant.types.FilterChain; +import org.apache.tools.ant.types.Reference; +import org.apache.tools.ant.types.Resource; +import org.apache.tools.ant.types.ResourceCollection; +import org.apache.tools.ant.util.FileUtils; + +/** + * Reads a resource as text document and creates a resource for each + * line. + * @since Ant 1.8.0 + */ +public class ResourceList extends DataType implements ResourceCollection { + private final Vector<FilterChain> filterChains = new Vector<FilterChain>(); + private final ArrayList<ResourceCollection> textDocuments = new ArrayList<ResourceCollection>(); + private final Union cachedResources = new Union(); + private volatile boolean cached = false; + private String encoding = null; + + public ResourceList() { + cachedResources.setCache(true); + } + + /** + * Adds a source. + */ + public void add(ResourceCollection rc) { + if (isReference()) { + throw noChildrenAllowed(); + } + textDocuments.add(rc); + setChecked(false); + } + + /** + * Adds a FilterChain. + */ + public final void addFilterChain(FilterChain filter) { + if (isReference()) { + throw noChildrenAllowed(); + } + filterChains.add(filter); + setChecked(false); + } + + /** + * Encoding to use for input, defaults to the platform's default + * encoding. <p> + * + * For a list of possible values see + * <a href="http://java.sun.com/j2se/1.5.0/docs/guide/intl/encoding.doc.html"> + * http://java.sun.com/j2se/1.5.0/docs/guide/intl/encoding.doc.html + * </a>.</p> + */ + public final void setEncoding(String encoding) { + if (isReference()) { + throw tooManyAttributes(); + } + this.encoding = encoding; + } + + /** + * Makes this instance in effect a reference to another ResourceList + * instance. + */ + public void setRefid(Reference r) throws BuildException { + if (encoding != null) { + throw tooManyAttributes(); + } + if (filterChains.size() > 0 || textDocuments.size() > 0) { + throw noChildrenAllowed(); + } + super.setRefid(r); + } + + /** + * Fulfill the ResourceCollection contract. The Iterator returned + * will throw ConcurrentModificationExceptions if ResourceCollections + * are added to this container while the Iterator is in use. + * @return a "fail-fast" Iterator. + */ + public final synchronized Iterator<Resource> iterator() { + if (isReference()) { + return ((ResourceList) getCheckedRef()).iterator(); + } + return cache().iterator(); + } + + /** + * Fulfill the ResourceCollection contract. + * @return number of elements as int. + */ + public synchronized int size() { + if (isReference()) { + return ((ResourceList) getCheckedRef()).size(); + } + return cache().size(); + } + + /** + * Fulfill the ResourceCollection contract. + * @return whether this is a filesystem-only resource collection. + */ + public synchronized boolean isFilesystemOnly() { + if (isReference()) { + return ((ResourceList) getCheckedRef()).isFilesystemOnly(); + } + return cache().isFilesystemOnly(); + } + + /** + * Overrides the version of DataType to recurse on all DataType + * child elements that may have been added. + * @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<Object> stk, Project p) + throws BuildException { + if (isChecked()) { + return; + } + if (isReference()) { + super.dieOnCircularReference(stk, p); + } else { + for (ResourceCollection resourceCollection : textDocuments) { + if (resourceCollection instanceof DataType) { + pushAndInvokeCircularReferenceCheck((DataType) resourceCollection, stk, p); + } + } + for (FilterChain filterChain : filterChains) { + pushAndInvokeCircularReferenceCheck(filterChain, stk, p); + } + setChecked(true); + } + } + + private synchronized ResourceCollection cache() { + if (!cached) { + dieOnCircularReference(); + for (ResourceCollection rc : textDocuments) { + for (Resource r : rc) { + cachedResources.add(read(r)); + } + } + cached = true; + } + return cachedResources; + } + + private ResourceCollection read(Resource r) { + BufferedInputStream bis = null; + try { + bis = new BufferedInputStream(r.getInputStream()); + Reader input = null; + if (encoding == null) { + input = new InputStreamReader(bis); + } else { + input = new InputStreamReader(bis, encoding); + } + ChainReaderHelper crh = new ChainReaderHelper(); + crh.setPrimaryReader(input); + crh.setFilterChains(filterChains); + crh.setProject(getProject()); + BufferedReader reader = new BufferedReader(crh.getAssembledReader()); + + Union streamResources = new Union(); + streamResources.setCache(true); + + String line = null; + while ((line = reader.readLine()) != null) { + streamResources.add(parse(line)); + } + + return streamResources; + } catch (final IOException ioe) { + throw new BuildException("Unable to read resource " + r.getName() + + ": " + ioe, ioe, getLocation()); + } finally { + FileUtils.close(bis); + } + } + + private Resource parse(final String line) { + PropertyHelper propertyHelper + = (PropertyHelper) PropertyHelper.getPropertyHelper(getProject()); + Object expanded = propertyHelper.parseProperties(line); + if (expanded instanceof Resource) { + return (Resource) expanded; + } + String expandedLine = expanded.toString(); + int colon = expandedLine.indexOf(":"); + if (colon != -1) { + // could be an URL or an absolute file on an OS with drives + try { + return new URLResource(expandedLine); + } catch (BuildException mfe) { + // a translated MalformedURLException + + // probably it's an absolute path fall back to file + // resource + } + } + return new FileResource(getProject(), expandedLine); + } +} |