org.springframework.ide.eclipse.beans.ui.model.metadata.BeanMetadataReference.java Source code

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Here is the source code for org.springframework.ide.eclipse.beans.ui.model.metadata.BeanMetadataReference.java

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/*******************************************************************************
 * Copyright (c) 2008, 2009 Spring IDE Developers
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     Spring IDE Developers - initial API and implementation
 *******************************************************************************/
package org.springframework.ide.eclipse.beans.ui.model.metadata;

import java.util.HashSet;
import java.util.Set;

import org.springframework.ide.eclipse.beans.core.model.IBeansProject;
import org.springframework.util.ObjectUtils;

/**
 * Holder that is used in the Spring and Project Explorer to link between a
 * certain meta data type identified by <code>key</code> and the children.
 * @author Christian Dupuis
 * @since 2.0.5
 */
public class BeanMetadataReference {

    private final Set<Object> beanMetaData;

    private String key;

    protected final IBeansProject beansProject;

    public BeanMetadataReference(IBeansProject project, Set<Object> beanMetaData, String key) {
        this.beansProject = project;
        this.beanMetaData = beanMetaData;
        this.key = key;
    }

    public BeanMetadataReference(IBeansProject project, String key) {
        this(project, new HashSet<Object>(), key);
    }

    public void addChild(Object metadata) {
        this.beanMetaData.add(metadata);
    }

    @Override
    public boolean equals(Object other) {
        if (this == other) {
            return true;
        }
        if (!(other instanceof BeanMetadataReference)) {
            return false;
        }
        BeanMetadataReference that = (BeanMetadataReference) other;
        if (!ObjectUtils.nullSafeEquals(this.key, that.key))
            return false;
        return ObjectUtils.nullSafeEquals(this.beansProject, that.beansProject);
    }

    public Object firstChild() {
        if (beanMetaData.size() > 0) {
            return beanMetaData.iterator().next();
        }
        return null;
    }

    public IBeansProject getBeansProject() {
        return beansProject;
    }

    public Object[] getChildren() {
        return beanMetaData.toArray();
    }

    public String getKey() {
        return key;
    }

    @Override
    public int hashCode() {
        int hashCode = ObjectUtils.nullSafeHashCode(beansProject);
        return 29 * hashCode + ObjectUtils.nullSafeHashCode(key);
    }

}