genericparams.java

Jamon是一个Java文本模板引擎

/*
 * The contents of this file are subject to the Mozilla Public
 * License Version 1.1 (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.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS
 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * rights and limitations under the License.
 *
 * The Original Code is Jamon code, released February, 2003.
 *
 * The Initial Developer of the Original Code is Ian Robertson.  Portions
 * created by Ian Robertson are Copyright (C) 2005 Ian Robertson.  All Rights
 * Reserved.
 *
 * Contributor(s):
 */

package org.jamon.codegen;

import java.util.LinkedList;
import java.util.List;

import org.jamon.node.GenericsBoundNode;
import org.jamon.node.GenericsParamNode;

public class GenericParams
{
    public void addParam(GenericsParamNode p_node)
    {
        m_genericsParamNodes.add(p_node);
    }

    public String generateGenericsDeclaration()
    {
        return generateGenericsSpecifiers(true);
    }

    public String generateGenericParamsList()
    {
        return generateGenericsSpecifiers(false);
    }

    public void suppressGenericHidingWarnings(CodeWriter p_writer)
    {
        if (!m_genericsParamNodes.isEmpty())
        {
            p_writer.println("@SuppressWarnings(\"hiding\")");
        }
    }

    public int getCount()
    {
        return m_genericsParamNodes.size();
    }

    private String generateGenericsSpecifiers(boolean p_forDeclaration)
    {
        if (m_genericsParamNodes.isEmpty())
        {
            return "";
        }
        else
        {
            StringBuilder builder = new StringBuilder();
            builder.append('<');
            boolean paramsPrinted = false;
            for (GenericsParamNode genericsParamNode : m_genericsParamNodes)
            {
                if (paramsPrinted)
                {
                    builder.append(", ");
                }
                else
                {
                    paramsPrinted = true;
                }
                builder.append(genericsParamNode.getName());
                if (p_forDeclaration)
                {
                    boolean boundsPrinted = false;
                    for (GenericsBoundNode bound : genericsParamNode.getBounds())
                    {
                        if (! boundsPrinted)
                        {
                            builder.append(" extends ");
                            boundsPrinted = true;
                        }
                        else
                        {
                            builder.append(" & ");
                        }
                        builder.append(bound.getClassName());
                    }
                }
            }
            builder.append('>');
            return builder.toString();
        }

    }

    private final List<GenericsParamNode> m_genericsParamNodes =
        new LinkedList<GenericsParamNode>();
}