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/*
 * 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 org.gradle.api.tasks.FileNormalizer;

import javax.annotation.Nullable;

/**
 * Visits properties of beans which are inputs, outputs, destroyables or local state.
 */
public interface PropertyVisitor {
    /**
     * Should only output file properties be visited?
     *
     * This is here as a temporary work around to allow a listener avoid broken `@Nested` properties whose getters fail when called just after the bean has been created.
     *
     * It is also here to avoid the cost of visiting input and other properties on creation when these are not used at this point.
     *
     * Later, these issues can be improved and this method removed.
     */
    boolean visitOutputFilePropertiesOnly();

    void visitInputFileProperty(String propertyName, boolean optional, boolean skipWhenEmpty, boolean incremental, @Nullable Class fileNormalizer, PropertyValue value, InputFilePropertyType filePropertyType);

    void visitInputProperty(String propertyName, PropertyValue value, boolean optional);

    void visitOutputFileProperty(String propertyName, boolean optional, PropertyValue value, OutputFilePropertyType filePropertyType);

    void visitDestroyableProperty(Object value);

    void visitLocalStateProperty(Object value);

    class Adapter implements PropertyVisitor {
        @Override
        public boolean visitOutputFilePropertiesOnly() {
            return false;
        }

        @Override
        public void visitInputFileProperty(String propertyName, boolean optional, boolean skipWhenEmpty, boolean incremental, @Nullable Class fileNormalizer, PropertyValue value, InputFilePropertyType filePropertyType) {
        }

        @Override
        public void visitInputProperty(String propertyName, PropertyValue value, boolean optional) {
        }

        @Override
        public void visitOutputFileProperty(String propertyName, boolean optional, PropertyValue value, OutputFilePropertyType filePropertyType) {
        }

        @Override
        public void visitDestroyableProperty(Object value) {
        }

        @Override
        public void visitLocalStateProperty(Object value) {
        }
    }
}