| /* |
| * 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.selectors; |
| |
| import java.util.Stack; |
| import java.util.Iterator; |
| |
| import org.apache.tools.ant.Project; |
| import org.apache.tools.ant.BuildException; |
| import org.apache.tools.ant.types.Comparison; |
| import org.apache.tools.ant.types.DataType; |
| import org.apache.tools.ant.types.Resource; |
| import org.apache.tools.ant.types.Quantifier; |
| import org.apache.tools.ant.types.ResourceCollection; |
| import org.apache.tools.ant.types.resources.Union; |
| import org.apache.tools.ant.types.resources.comparators.ResourceComparator; |
| import org.apache.tools.ant.types.resources.comparators.DelegatedResourceComparator; |
| |
| /** |
| * ResourceSelector that compares against "control" Resource(s) |
| * using ResourceComparators. |
| * @since Ant 1.7 |
| */ |
| public class Compare extends DataType implements ResourceSelector { |
| |
| private static final String ONE_CONTROL_MESSAGE |
| = " the <control> element should be specified exactly once."; |
| |
| private DelegatedResourceComparator comp = new DelegatedResourceComparator(); |
| private Quantifier against = Quantifier.ALL; |
| |
| private Comparison when = Comparison.EQUAL; |
| |
| private Union control; |
| |
| /** |
| * Add a ResourceComparator to this Compare selector. |
| * If multiple ResourceComparators are added, they will be processed in LIFO order. |
| * @param c the ResourceComparator to add. |
| */ |
| public synchronized void add(ResourceComparator c) { |
| if (isReference()) { |
| throw noChildrenAllowed(); |
| } |
| comp.add(c); |
| } |
| |
| /** |
| * Set the quantifier to be used. Default "all". |
| * @param against the Quantifier EnumeratedAttribute to use. |
| */ |
| public synchronized void setAgainst(Quantifier against) { |
| if (isReference()) { |
| throw tooManyAttributes(); |
| } |
| this.against = against; |
| } |
| |
| /** |
| * Set the comparison to be used. Default "equal". |
| * @param when the Comparison EnumeratedAttribute to use. |
| */ |
| public synchronized void setWhen(Comparison when) { |
| if (isReference()) { |
| throw tooManyAttributes(); |
| } |
| this.when = when; |
| } |
| |
| /** |
| * Create the nested control element. These are the |
| * resources to compare against. |
| * @return ResourceCollection. |
| */ |
| public synchronized ResourceCollection createControl() { |
| if (isReference()) { |
| throw noChildrenAllowed(); |
| } |
| if (control != null) { |
| throw oneControl(); |
| } |
| control = new Union(); |
| return control; |
| } |
| |
| //implement ResourceSelector; inherit doc |
| /** {@inheritDoc} */ |
| public synchronized boolean isSelected(Resource r) { |
| if (isReference()) { |
| return ((ResourceSelector) getCheckedRef()).isSelected(r); |
| } |
| if (control == null) { |
| throw oneControl(); |
| } |
| int t = 0, f = 0; |
| for (Iterator it = control.iterator(); it.hasNext();) { |
| if (when.evaluate(comp.compare(r, (Resource) it.next()))) { |
| t++; |
| } else { |
| f++; |
| } |
| } |
| return against.evaluate(t, f); |
| } |
| |
| /** |
| * Overrides the version from DataType |
| * to recurse on nested ResourceComparators. |
| * @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 (control != null) { |
| DataType.invokeCircularReferenceCheck(control, stk, p); |
| } |
| DataType.invokeCircularReferenceCheck(comp, stk, p); |
| setChecked(true); |
| } |
| } |
| |
| private BuildException oneControl() { |
| return new BuildException(super.toString() + ONE_CONTROL_MESSAGE); |
| } |
| } |