Scala example source code file (JMethodType.java)

This example Scala source code file (JMethodType.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 - Scala tags/keywords

argless_void_function, jmethodtype, jmethodtype, jtype, jtype, string, string, stringbuffer, stringbuffer, t_unknown, unsupportedoperationexception

The Scala JMethodType.java source code

/* FJBG -- Fast Java Bytecode Generator
 * Copyright 2002-2011 LAMP/EPFL
 * @author  Michel Schinz
 */

package ch.epfl.lamp.fjbg;

/**
 * Type for Java methods. These types do not really exist in Java, but
 * are provided here because they are useful in several places.
 *
 * @author Michel Schinz
 * @version 1.0
 */

public class JMethodType extends JType {
    protected final JType returnType;
    protected final JType[] argTypes;
    protected String signature = null;

    public final static JMethodType ARGLESS_VOID_FUNCTION =
        new JMethodType(JType.VOID, JType.EMPTY_ARRAY);

    public JMethodType(JType returnType, JType[] argTypes) {
        this.returnType = returnType;
        this.argTypes = argTypes;
    }

    public JType getReturnType() { return returnType; }
    public JType[] getArgumentTypes() { return argTypes; }

    public int getSize() {
        throw new UnsupportedOperationException();
    }

    public String getSignature() {
        if (signature == null) {
            StringBuffer buf = new StringBuffer();
            buf.append('(');
            for (int i = 0; i < argTypes.length; ++i)
                buf.append(argTypes[i].getSignature());
            buf.append(')');
            buf.append(returnType.getSignature());
            signature = buf.toString();
        }
        return signature;
    }

    public int getTag() { return T_UNKNOWN; }

    public String toString() {
        StringBuffer buf = new StringBuffer();
        buf.append('(');
        for (int i = 0; i < argTypes.length; ++i)
            buf.append(argTypes[i].toString());
        buf.append(')');
        buf.append(returnType.toString());
        return buf.toString();
    }

    public int getArgsSize() {
        int size = 0;
        for (int i = 0; i < argTypes.length; ++i)
            size += argTypes[i].getSize();
        return size;
    }

    public int getProducedStack() {
        return returnType.getSize() - getArgsSize();
    }

    public boolean isCompatibleWith(JType other) {
        return false;
    }
    public boolean equals(Object o) {
        if (o instanceof JMethodType)
            return ((JMethodType)o).getSignature().equals(this.getSignature());
        else
            return false;
    }
    public int hashCode() {
        if (signature == null)
            return 0;
        else
            return signature.hashCode();
    }
}