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Ant example source code file (NameAndTypeCPInfo.java)

This example Ant source code file (NameAndTypeCPInfo.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

constantpoolentry, io, ioexception, name, name, nameandtypecpinfo, nameandtypecpinfo, string, string, utf8cpinfo, utf8cpinfo

The NameAndTypeCPInfo.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 NameAndType CP Info
 *
 */
public class NameAndTypeCPInfo extends ConstantPoolEntry {

    /** Constructor. */
    public NameAndTypeCPInfo() {
        super(CONSTANT_NAMEANDTYPE, 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 {
        nameIndex = cpStream.readUnsignedShort();
        descriptorIndex = 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 = "Name = " + name + ", type = " + type;
        } else {
            value = "Name index = " + nameIndex
                 + ", descriptor index = " + descriptorIndex;
        }

        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) {
        name = ((Utf8CPInfo) constantPool.getEntry(nameIndex)).getValue();
        type = ((Utf8CPInfo) constantPool.getEntry(descriptorIndex)).getValue();

        super.resolve(constantPool);
    }

    /**
     * Get the name component of this entry
     *
     * @return the name of this name and type entry
     */
    public String getName() {
        return name;
    }

    /**
     * Get the type signature of this entry
     *
     * @return the type signature of this entry
     */
    public String getType() {
        return type;
    }

    /** the name component of this entry */
    private String name;
    /** the type component of this entry */
    private String type;
    /**
     * the index into the constant pool at which the name component's string
     * value is stored
     */
    private int nameIndex;
    /**
     * the index into the constant pool where the type descriptor string is
     * stored.
     */
    private int descriptorIndex;
}

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