diff options
Diffstat (limited to 'framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/types/resources/selectors/Compare.java')
-rw-r--r-- | framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/types/resources/selectors/Compare.java | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/types/resources/selectors/Compare.java b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/types/resources/selectors/Compare.java new file mode 100644 index 00000000..f345c278 --- /dev/null +++ b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/types/resources/selectors/Compare.java @@ -0,0 +1,149 @@ +/* + * 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 org.apache.tools.ant.BuildException; +import org.apache.tools.ant.Project; +import org.apache.tools.ant.types.Comparison; +import org.apache.tools.ant.types.DataType; +import org.apache.tools.ant.types.Quantifier; +import org.apache.tools.ant.types.Resource; +import org.apache.tools.ant.types.ResourceCollection; +import org.apache.tools.ant.types.resources.Union; +import org.apache.tools.ant.types.resources.comparators.DelegatedResourceComparator; +import org.apache.tools.ant.types.resources.comparators.ResourceComparator; + +/** + * 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); + setChecked(false); + } + + /** + * 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(); + setChecked(false); + 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(); + } + dieOnCircularReference(); + int t = 0, f = 0; + for (Resource res : control) { + if (when.evaluate(comp.compare(r, res))) { + 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<Object> stk, Project p) + throws BuildException { + if (isChecked()) { + return; + } + if (isReference()) { + super.dieOnCircularReference(stk, p); + } else { + if (control != null) { + DataType.pushAndInvokeCircularReferenceCheck(control, stk, p); + } + DataType.pushAndInvokeCircularReferenceCheck(comp, stk, p); + setChecked(true); + } + } + + private BuildException oneControl() { + return new BuildException(super.toString() + ONE_CONTROL_MESSAGE); + } +} |