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/*
 * Copyright 2009 the original author or authors.
 *
 * Licensed 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.gradle.api.internal.file.collections;

import groovy.lang.Closure;
import org.gradle.api.Action;
import org.gradle.api.InvalidUserDataException;
import org.gradle.api.file.ConfigurableFileTree;
import org.gradle.api.file.CopySpec;
import org.gradle.api.file.FileTreeElement;
import org.gradle.api.internal.file.CompositeFileTree;
import org.gradle.api.internal.file.FileResolver;
import org.gradle.api.internal.file.copy.FileCopier;
import org.gradle.api.internal.tasks.DefaultTaskDependency;
import org.gradle.api.internal.tasks.TaskDependencyResolveContext;
import org.gradle.api.internal.tasks.TaskResolver;
import org.gradle.api.specs.Spec;
import org.gradle.api.tasks.WorkResult;
import org.gradle.api.tasks.util.PatternSet;
import org.gradle.internal.file.PathToFileResolver;
import org.gradle.util.ConfigureUtil;

import java.io.File;
import java.util.Collections;
import java.util.Map;
import java.util.Set;

public class DefaultConfigurableFileTree extends CompositeFileTree implements ConfigurableFileTree {
    private Object dir;
    private final PatternSet patternSet;
    private final PathToFileResolver resolver;
    private final FileCopier fileCopier;
    private final DefaultTaskDependency buildDependency;
    private final DirectoryFileTreeFactory directoryFileTreeFactory;

    public DefaultConfigurableFileTree(Object dir, FileResolver resolver, TaskResolver taskResolver, FileCopier fileCopier, DirectoryFileTreeFactory directoryFileTreeFactory) {
        this(Collections.singletonMap("dir", dir), resolver, taskResolver, fileCopier, directoryFileTreeFactory);
    }

    public DefaultConfigurableFileTree(Map args, FileResolver resolver, TaskResolver taskResolver, FileCopier fileCopier, DirectoryFileTreeFactory directoryFileTreeFactory) {
        this.resolver = resolver;
        this.fileCopier = fileCopier;
        this.directoryFileTreeFactory = directoryFileTreeFactory;
        patternSet = resolver.getPatternSetFactory().create();
        buildDependency = new DefaultTaskDependency(taskResolver);
        ConfigureUtil.configureByMap(args, this);
    }

    public PatternSet getPatterns() {
        return patternSet;
    }

    public DefaultConfigurableFileTree setDir(Object dir) {
        from(dir);
        return this;
    }

    public File getDir() {
        if (dir == null) {
            throw new InvalidUserDataException("A base directory must be specified in the task or via a method argument!");
        }
        return resolver.resolve(dir);
    }

    public DefaultConfigurableFileTree from(Object dir) {
        this.dir = dir;
        return this;
    }

    public String getDisplayName() {
        return "directory '" + dir + "'";
    }

    public WorkResult copy(final Closure closure) {
        return fileCopier.copy(new Action() {
            public void execute(CopySpec copySpec) {
                copySpec.from(DefaultConfigurableFileTree.this);
                ConfigureUtil.configure(closure, copySpec);
            }
        });
    }

    public Set getIncludes() {
        return patternSet.getIncludes();
    }

    public DefaultConfigurableFileTree setIncludes(Iterable includes) {
        patternSet.setIncludes(includes);
        return this;
    }

    public Set getExcludes() {
        return patternSet.getExcludes();
    }

    public DefaultConfigurableFileTree setExcludes(Iterable excludes) {
        patternSet.setExcludes(excludes);
        return this;
    }

    public DefaultConfigurableFileTree include(String... includes) {
        patternSet.include(includes);
        return this;
    }

    public DefaultConfigurableFileTree include(Iterable includes) {
        patternSet.include(includes);
        return this;
    }

    public DefaultConfigurableFileTree include(Closure includeSpec) {
        patternSet.include(includeSpec);
        return this;
    }

    public DefaultConfigurableFileTree include(Spec includeSpec) {
        patternSet.include(includeSpec);
        return this;
    }

    public DefaultConfigurableFileTree exclude(String... excludes) {
        patternSet.exclude(excludes);
        return this;
    }

    public DefaultConfigurableFileTree exclude(Iterable excludes) {
        patternSet.exclude(excludes);
        return this;
    }

    public DefaultConfigurableFileTree exclude(Spec excludeSpec) {
        patternSet.exclude(excludeSpec);
        return this;
    }

    public DefaultConfigurableFileTree exclude(Closure excludeSpec) {
        patternSet.exclude(excludeSpec);
        return this;
    }

    @Override
    public void visitContents(FileCollectionResolveContext context) {
        File dir = getDir();
        context.add(directoryFileTreeFactory.create(dir, patternSet));
    }

    @Override
    public void visitDependencies(TaskDependencyResolveContext context) {
        context.add(buildDependency);
    }

    public ConfigurableFileTree builtBy(Object... tasks) {
        buildDependency.add(tasks);
        return this;
    }

    public Set