org.springframework.beans.BeanMetadataAttribute.java Source code

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Here is the source code for org.springframework.beans.BeanMetadataAttribute.java

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/*
 * Copyright 2002-2017 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
 *
 *      https://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.springframework.beans;

import org.springframework.lang.Nullable;
import org.springframework.util.Assert;
import org.springframework.util.ObjectUtils;

/**
 * Holder for a key-value style attribute that is part of a bean definition.
 * Keeps track of the definition source in addition to the key-value pair.
 *
 * @author Juergen Hoeller
 * @since 2.5
 */
public class BeanMetadataAttribute implements BeanMetadataElement {

    private final String name;

    @Nullable
    private final Object value;

    @Nullable
    private Object source;

    /**
     * Create a new AttributeValue instance.
     * @param name the name of the attribute (never {@code null})
     * @param value the value of the attribute (possibly before type conversion)
     */
    public BeanMetadataAttribute(String name, @Nullable Object value) {
        Assert.notNull(name, "Name must not be null");
        this.name = name;
        this.value = value;
    }

    /**
     * Return the name of the attribute.
     */
    public String getName() {
        return this.name;
    }

    /**
     * Return the value of the attribute.
     */
    @Nullable
    public Object getValue() {
        return this.value;
    }

    /**
     * Set the configuration source {@code Object} for this metadata element.
     * <p>The exact type of the object will depend on the configuration mechanism used.
     */
    public void setSource(@Nullable Object source) {
        this.source = source;
    }

    @Override
    @Nullable
    public Object getSource() {
        return this.source;
    }

    @Override
    public boolean equals(@Nullable Object other) {
        if (this == other) {
            return true;
        }
        if (!(other instanceof BeanMetadataAttribute)) {
            return false;
        }
        BeanMetadataAttribute otherMa = (BeanMetadataAttribute) other;
        return (this.name.equals(otherMa.name) && ObjectUtils.nullSafeEquals(this.value, otherMa.value)
                && ObjectUtils.nullSafeEquals(this.source, otherMa.source));
    }

    @Override
    public int hashCode() {
        return this.name.hashCode() * 29 + ObjectUtils.nullSafeHashCode(this.value);
    }

    @Override
    public String toString() {
        return "metadata attribute '" + this.name + "'";
    }

}