files.java

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/*
 *  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.File;
import java.util.Vector;
import java.util.Iterator;
import java.util.Collections;

import org.apache.tools.ant.Project;
import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.DirectoryScanner;
import org.apache.tools.ant.types.Reference;
import org.apache.tools.ant.types.PatternSet;
import org.apache.tools.ant.types.ResourceCollection;
import org.apache.tools.ant.types.selectors.FileSelector;
import org.apache.tools.ant.types.selectors.AbstractSelectorContainer;

/**
 * ResourceCollection implementation; like AbstractFileSet with absolute paths.
 * @since Ant 1.7
 */
public class Files extends AbstractSelectorContainer
    implements Cloneable, ResourceCollection {

    private static final Iterator EMPTY_ITERATOR
        = Collections.EMPTY_SET.iterator();

    private PatternSet defaultPatterns = new PatternSet();
    private Vector additionalPatterns = new Vector();
    private Vector selectors = new Vector();

    private boolean useDefaultExcludes = true;
    private boolean caseSensitive = true;
    private boolean followSymlinks = true;

    /* cached DirectoryScanner instance */
    private DirectoryScanner ds = null;

    /**
     * Construct a new <code>Files</code> collection.
     */
    public Files() {
        super();
    }

    /**
     * Construct a new <code>Files</code> collection, shallowly cloned
     * from the specified <code>Files</code>.
     * @param f the <code>Files</code> to use as a template.
     */
    protected Files(Files f) {
        this.defaultPatterns = f.defaultPatterns;
        this.additionalPatterns = f.additionalPatterns;
        this.selectors = f.selectors;
        this.useDefaultExcludes = f.useDefaultExcludes;
        this.caseSensitive = f.caseSensitive;
        this.followSymlinks = f.followSymlinks;
        this.ds = f.ds;
        setProject(f.getProject());
    }

    /**
     * Make this instance in effect a reference to another instance.
     *
     * <p>You must not set another attribute or nest elements inside
     * this element if you make it a reference.</p>
     * @param r the <code>Reference</code> to use.
     * @throws BuildException if there is a problem.
     */
    public void setRefid(Reference r) throws BuildException {
        if (hasPatterns(defaultPatterns)) {
            throw tooManyAttributes();
        }
        if (!additionalPatterns.isEmpty()) {
            throw noChildrenAllowed();
        }
        if (!selectors.isEmpty()) {
            throw noChildrenAllowed();
        }
        super.setRefid(r);
    }

    /**
     * Create a nested patternset.
     * @return <code>PatternSet</code>.
     */
    public synchronized PatternSet createPatternSet() {
        if (isReference()) {
            throw noChildrenAllowed();
        }
        PatternSet patterns = new PatternSet();
        additionalPatterns.addElement(patterns);
        ds = null;
        return patterns;
    }

    /**
     * Add a name entry to the include list.
     * @return <code>PatternSet.NameEntry</code>.
     */
    public synchronized PatternSet.NameEntry createInclude() {
        if (isReference()) {
            throw noChildrenAllowed();
        }
        ds = null;
        return defaultPatterns.createInclude();
    }

    /**
     * Add a name entry to the include files list.
     * @return <code>PatternSet.NameEntry</code>.
     */
    public synchronized PatternSet.NameEntry createIncludesFile() {
        if (isReference()) {
            throw noChildrenAllowed();
        }
        ds = null;
        return defaultPatterns.createIncludesFile();
    }

    /**
     * Add a name entry to the exclude list.
     * @return <code>PatternSet.NameEntry</code>.
     */
    public synchronized PatternSet.NameEntry createExclude() {
        if (isReference()) {
            throw noChildrenAllowed();
        }
        ds = null;
        return defaultPatterns.createExclude();
    }

    /**
     * Add a name entry to the excludes files list.
     * @return <code>PatternSet.NameEntry</code>.
     */
    public synchronized PatternSet.NameEntry createExcludesFile() {
        if (isReference()) {
            throw noChildrenAllowed();
        }
        ds = null;
        return defaultPatterns.createExcludesFile();
    }

    /**
     * Append <code>includes</code> to the current list of include
     * patterns.
     *
     * <p>Patterns may be separated by a comma or a space.</p>
     *
     * @param includes the <code>String</code> containing the include patterns.
     */
    public synchronized void setIncludes(String includes) {
        checkAttributesAllowed();
        defaultPatterns.setIncludes(includes);
        ds = null;
    }

    /**
     * Append <code>includes</code> to the current list of include
     * patterns.
     *
     * @param includes array containing the include patterns.
     */
    public synchronized void appendIncludes(String[] includes) {
        checkAttributesAllowed();
        if (includes != null) {
            for (int i = 0; i < includes.length; i++) {
                defaultPatterns.createInclude().setName(includes[i]);
            }
            ds = null;
        }
    }

    /**
     * Append <code>excludes</code> to the current list of exclude
     * patterns.
     *
     * <p>Patterns may be separated by a comma or a space.</p>
     *
     * @param excludes the <code>String</code> containing the exclude patterns.
     */
    public synchronized void setExcludes(String excludes) {
        checkAttributesAllowed();
        defaultPatterns.setExcludes(excludes);
        ds = null;
    }

    /**
     * Append <code>excludes</code> to the current list of include
     * patterns.
     *
     * @param excludes array containing the exclude patterns.
     */
    public synchronized void appendExcludes(String[] excludes) {
        checkAttributesAllowed();
        if (excludes != null) {
            for (int i = 0; i < excludes.length; i++) {
                defaultPatterns.createExclude().setName(excludes[i]);
            }
            ds = null;
        }
    }

    /**
     * Set the <code>File</code> containing the includes patterns.
     *
     * @param incl <code>File</code> instance.
     * @throws BuildException if there is a problem.
     */
    public synchronized void setIncludesfile(File incl) throws BuildException {
        checkAttributesAllowed();
        defaultPatterns.setIncludesfile(incl);
        ds = null;
    }

    /**
     * Set the <code>File</code> containing the excludes patterns.
     *
     * @param excl <code>File</code> instance.
     * @throws BuildException if there is a problem.
     */
    public synchronized void setExcludesfile(File excl) throws BuildException {
        checkAttributesAllowed();
        defaultPatterns.setExcludesfile(excl);
        ds = null;
    }

    /**
     * Set whether default exclusions should be used or not.
     *
     * @param useDefaultExcludes <code>boolean</code>.
     */
    public synchronized void setDefaultexcludes(boolean useDefaultExcludes) {
        checkAttributesAllowed();
        this.useDefaultExcludes = useDefaultExcludes;
        ds = null;
    }