Ant example source code file (MethodRefCPInfo.java)

This example Ant source code file (MethodRefCPInfo.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Ant tags/keywords

class, class, classcpinfo, classcpinfo, constantpoolentry, io, ioexception, method, methodrefcpinfo, nameandtypecpinfo, nameandtypecpinfo, string, string

The MethodRefCPInfo.java source code

/*
 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You 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.apache.tools.ant.taskdefs.optional.depend.constantpool;

import java.io.DataInputStream;
import java.io.IOException;

/**
 * A MethodRef CP Info
 *
 */
public class MethodRefCPInfo extends ConstantPoolEntry {
    /** the name of the class defining this method */
    private String methodClassName;
    /** the name of the method */
    private String methodName;
    /** the method's type descriptor */
    private String methodType;
    /** The index into the constant pool which defines the class of this method. */
    private int classIndex;
    /**
     * the index into the constant pool which defined the name and type
     * signature of the method
     */
    private int nameAndTypeIndex;

    /** Constructor. */
    public MethodRefCPInfo() {
        super(CONSTANT_METHODREF, 1);
    }

    /**
     * read a constant pool entry from a class stream.
     *
     * @param cpStream the DataInputStream which contains the constant pool
     *      entry to be read.
     * @exception IOException if there is a problem reading the entry from
     *      the stream.
     */
    public void read(DataInputStream cpStream) throws IOException {
        classIndex = cpStream.readUnsignedShort();
        nameAndTypeIndex = cpStream.readUnsignedShort();
    }

    /**
     * Print a readable version of the constant pool entry.
     *
     * @return the string representation of this constant pool entry.
     */
    public String toString() {
        String value;

        if (isResolved()) {
            value = "Method : Class = " + methodClassName + ", name = "
                 + methodName + ", type = " + methodType;
        } else {
            value = "Method : Class index = " + classIndex
                 + ", name and type index = " + nameAndTypeIndex;
        }

        return value;
    }

    /**
     * Resolve this constant pool entry with respect to its dependents in
     * the constant pool.
     *
     * @param constantPool the constant pool of which this entry is a member
     *      and against which this entry is to be resolved.
     */
    public void resolve(ConstantPool constantPool) {
        ClassCPInfo methodClass
             = (ClassCPInfo) constantPool.getEntry(classIndex);

        methodClass.resolve(constantPool);

        methodClassName = methodClass.getClassName();

        NameAndTypeCPInfo nt
             = (NameAndTypeCPInfo) constantPool.getEntry(nameAndTypeIndex);

        nt.resolve(constantPool);

        methodName = nt.getName();
        methodType = nt.getType();

        super.resolve(constantPool);
    }

    /**
     * Get the name of the class defining the method
     *
     * @return the name of the class defining this method
     */
    public String getMethodClassName() {
        return methodClassName;
    }

    /**
     * Get the name of the method.
     *
     * @return the name of the method.
     */
    public String getMethodName() {
        return methodName;
    }

    /**
     * Get the type signature of the method.
     *
     * @return the type signature of the method.
     */
    public String getMethodType() {
        return methodType;
    }

}