/**************************************************************************************
 * Copyright (c) Jonas Bonér, Alexandre Vasseur. All rights reserved.                 *
 * http://aspectwerkz.codehaus.org                                                    *
 * ---------------------------------------------------------------------------------- *
 * The software in this package is published under the terms of the LGPL license      *
 * a copy of which has been included with this distribution in the license.txt file.  *
 **************************************************************************************/
package org.codehaus.aspectwerkz.definition;

import org.codehaus.aspectwerkz.expression.ExpressionInfo;

import java.util.ArrayList;
import java.util.List;

/**
 * Holds the meta-data for the interface introductions. <p/>This definition holds only pure interface introduction.
 * <p/>It is extended in IntroductionDefinition for interface+implementation introductions
 * 
 * @author <a href="mailto:jboner@codehaus.org">Jonas Bonér </a>
 * @author <a href="mailto:alex@gnilux.com">Alexandre Vasseur </a>
 */
public class InterfaceIntroductionDefinition {
    /**
     * The name of the interface introduction.
     */
    protected final String m_name;

    /**
     * The introduction expressions.
     */
    protected ExpressionInfo[] m_expressionInfos;

    /**
     * The attribute for the introduction.
     */
    protected String m_attribute = "";

    /**
     * The interface classes name.
     */
    protected List m_interfaceClassNames = new ArrayList();

    /**
     * Creates a new introduction meta-data instance.
     * 
     * @param name the name of the expressionInfo
     * @param expressionInfo the expressionInfo
     * @param interfaceClassName the class name of the interface
     */
    public InterfaceIntroductionDefinition(final String name,
                                           final ExpressionInfo expressionInfo,
                                           final String interfaceClassName) {
        if (name == null) {
            throw new IllegalArgumentException("name can not be null");
        }
        if (expressionInfo == null) {
            throw new IllegalArgumentException("expressionInfo can not be null");
        }
        if (interfaceClassName == null) {
            throw new IllegalArgumentException("interface class name can not be null");
        }
        m_name = name;
        m_interfaceClassNames.add(interfaceClassName);
        m_expressionInfos = new ExpressionInfo[1];
        m_expressionInfos[0] = expressionInfo;
    }

    /**
     * Returns the name of the introduction.
     * 
     * @return the name
     */
    public String getName() {
        return m_name;
    }

    /**
     * Returns the expressions.
     * 
     * @return the expressions array
     */
    public ExpressionInfo[] getExpressionInfos() {
        return m_expressionInfos;
    }

    /**
     * Returns the class name of the interface.
     * 
     * @return the class name of the interface
     */
    public String getInterfaceClassName() {
        return (String) m_interfaceClassNames.get(0);
    }

    /**
     * Returns the class name of the interface.
     * 
     * @return the class name of the interface
     */
    public List getInterfaceClassNames() {
        return m_interfaceClassNames;
    }

    /**
     * Returns the attribute.
     * 
     * @return the attribute
     */
    public String getAttribute() {
        return m_attribute;
    }

    /**
     * Sets the attribute.
     * 
     * @param attribute the attribute
     */
    public void setAttribute(final String attribute) {
        m_attribute = attribute;
    }

    /**
     * Adds a new expression info.
     * 
     * @param expression a new expression info
     */
    public void addExpressionInfo(final ExpressionInfo expression) {
        final ExpressionInfo[] tmpExpressions = new ExpressionInfo[m_expressionInfos.length + 1];
        java.lang.System.arraycopy(m_expressionInfos, 0, tmpExpressions, 0, m_expressionInfos.length);
        tmpExpressions[m_expressionInfos.length] = expression;
        m_expressionInfos = new ExpressionInfo[m_expressionInfos.length + 1];
        java.lang.System.arraycopy(tmpExpressions, 0, m_expressionInfos, 0, tmpExpressions.length);
    }

    /**
     * Adds an array with new expression infos.
     * 
     * @param expressions an array with new expression infos
     */
    public void addExpressionInfos(final ExpressionInfo[] expressions) {
        final ExpressionInfo[] tmpExpressions = new ExpressionInfo[m_expressionInfos.length + expressions.length];
        java.lang.System.arraycopy(m_expressionInfos, 0, tmpExpressions, 0, m_expressionInfos.length);
        java.lang.System.arraycopy(expressions, 0, tmpExpressions, m_expressionInfos.length, expressions.length);
        m_expressionInfos = new ExpressionInfo[m_expressionInfos.length + expressions.length];
        java.lang.System.arraycopy(tmpExpressions, 0, m_expressionInfos, 0, tmpExpressions.length);
    }
}