/*
 * Copyright 2017 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.tasks.properties;

import com.google.common.collect.ImmutableSortedSet;
import com.google.common.collect.Lists;
import org.gradle.api.Task;
import org.gradle.api.internal.file.FileResolver;
import org.gradle.api.internal.file.FileTreeInternal;
import org.gradle.api.internal.tasks.PropertyFileCollection;
import org.gradle.api.internal.tasks.TaskPropertyUtils;
import org.gradle.api.tasks.FileNormalizer;

import javax.annotation.Nullable;
import java.util.List;

public class GetInputFilesVisitor extends PropertyVisitor.Adapter {
    private final List<InputFilePropertySpec> specs = Lists.newArrayList();
    private final FileResolver resolver;
    private final String ownerDisplayName;
    private boolean hasSourceFiles;

    private ImmutableSortedSet<InputFilePropertySpec> fileProperties;

    public GetInputFilesVisitor(String ownerDisplayName, FileResolver fileResolver) {
        this.resolver = fileResolver;
        this.ownerDisplayName = ownerDisplayName;
    }

    @Override
    public void visitInputFileProperty(final String propertyName, boolean optional, boolean skipWhenEmpty, Class<? extends FileNormalizer> fileNormalizer, PropertyValue value, InputFilePropertyType filePropertyType) {
        PropertyValue actualValue = filePropertyType == InputFilePropertyType.DIRECTORY ? FileTreeValue.create(resolver, value) : value;
        specs.add(new DefaultInputFilePropertySpec(
            propertyName,
            fileNormalizer,
            new PropertyFileCollection(ownerDisplayName, propertyName, "input", resolver, actualValue),
            skipWhenEmpty));
        if (skipWhenEmpty) {
            hasSourceFiles = true;
        }
    }

    public ImmutableSortedSet<InputFilePropertySpec> getFileProperties() {
        if (fileProperties == null) {
            fileProperties = TaskPropertyUtils.collectFileProperties("input", specs.iterator());
        }
        return fileProperties;
    }

    public boolean hasSourceFiles() {
        return hasSourceFiles;
    }

    private static class FileTreeValue implements PropertyValue {
        private final PropertyValue delegate;
        private final FileTreeInternal fileTree;

        public static FileTreeValue create(FileResolver fileResolver, PropertyValue value) {
            FileTreeInternal fileTree = fileResolver.resolveFilesAsTree(value);
            return new FileTreeValue(value, fileTree);
        }

        public FileTreeValue(PropertyValue delegate, FileTreeInternal fileTree) {
            this.delegate = delegate;
            this.fileTree = fileTree;
        }

        @Nullable
        @Override
        public Object call() {
            return fileTree;
        }

        @Override
        public void attachProducer(Task producer) {
            delegate.attachProducer(producer);
        }

        @Override
        public void maybeFinalizeValue() {
            delegate.maybeFinalizeValue();
        }
    }
}

@@ -780,116 +780,34 @@
 api.
-Task;%0Aimport org.gradle.api.internal.file.FileResolver;%0Aimport org.gradle.api.internal.file.FileTreeInternal
+internal.file.FileResolver
 ;%0Aim
@@ -970,42 +970,8 @@
 r;%0A%0A
-import javax.annotation.Nullable;%0A
 impo
@@ -1747,29 +1747,22 @@
         
-PropertyValue
+Object
  actualV
@@ -1826,39 +1826,36 @@
 Y ? 
-FileTreeValue.create(resolver, 
+resolver.resolveFilesAsTree(
 valu
@@ -2478,24 +2478,24 @@
 ceFiles() %7B%0A
+
         retu
@@ -2522,933 +2522,7 @@
    %7D
-%0A%0A    private static class FileTreeValue implements PropertyValue %7B%0A        private final PropertyValue delegate;%0A        private final FileTreeInternal fileTree;%0A%0A        public static FileTreeValue create(FileResolver fileResolver, PropertyValue value) %7B%0A            FileTreeInternal fileTree = fileResolver.resolveFilesAsTree(value);%0A            return new FileTreeValue(value, fileTree);%0A        %7D%0A%0A        public FileTreeValue(PropertyValue delegate, FileTreeInternal fileTree) %7B%0A            this.delegate = delegate;%0A            this.fileTree = fileTree;%0A        %7D%0A%0A        @Nullable%0A        @Override%0A        public Object call() %7B%0A            return fileTree;%0A        %7D%0A%0A        @Override%0A        public void attachProducer(Task producer) %7B%0A            delegate.attachProducer(producer);%0A        %7D%0A%0A        @Override%0A        public void maybeFinalizeValue() %7B%0A            delegate.maybeFinalizeValue();%0A        %7D%0A    %7D
 %0A%7D%0A

Remove FileTreeValue