PSFile.java

// Copyright 2001, FreeHEP.
package org.freehep.postscript;

import java.io.IOException;

/**
 * Objects for PostScript Processor, as defined in 3.3 Data Types and Objects
 *
 * @author Mark Donszelmann
 * @version $Id: PSFile.java 8958 2006-09-12 23:37:43Z duns $
 */
public abstract class PSFile extends PSComposite {
    protected String filename;
    protected boolean filter;
    
    protected PSFile(String name, boolean isFilter) {
        super("file", true);
        filter = isFilter;
        filename = name;
    }     
        
    public boolean execute(OperandStack os) {
        error(os, new IOError());
        return true;
    }
    
    public String getType() {
        return "filetype";
    }

    public abstract void close() throws IOException;
        
    public int read() throws IOException {
        throw new IOException();
    }
    
    public String readLine() throws IOException {
        throw new IOException();
    }
    
    public void write(int b, boolean secure) throws IOException {
        throw new IOException();
    }
    
    public void seek(long pos) throws IOException {
        throw new IOException();
    }
    
    public long getFilePointer() throws IOException {
        throw new IOException();
    }
    
    public int available() throws IOException {
        throw new IOException();
    }
    
    public void flush() throws IOException {
        throw new IOException();
    }

    public void reset() throws IOException {
        throw new IOException();
    }
    
    public boolean markSupported() {
        return false;
    }
    
    public void mark(int readLimit) {
        // ignored
    }
    
    public abstract boolean isValid();
        
    public String cvs() {
        return name;
    }
    
    public String toString() {
        return "--"+((isExecutable()) ? "*" : "")+name+
               " ("+filename+") --";
    }
}