/home/palakars/workspace-inprogress/code-in-progress/aitools3/aitools3-aq-invertedindex2-java/src/de/aitools/aq/value/single/SingleString.java

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// Copyright (C) 2011 webis.de. All rights reserved.
package de.aitools.aq.value.single;

import java.io.PrintStream;
import java.util.Scanner;

import com.sun.jna.Memory;
import com.sun.jna.Native;
import com.sun.jna.Pointer;

import de.aitools.aq.check.A;
import de.aitools.aq.value.Value;

public class SingleString extends Value {

        public static final int NATIVE_TYPE_ID = 105;
        
        private static final int SIZEOF_STRING_SIZE = Value.SIZEOF_SHORT;
        
        public SingleString() {
                e = new String();
        }
        
        public SingleString(String e) {
                setString(e);
        }
        
        public SingleString(SingleString string) {
                e = string.e;
        }
        
        public String getString() {
                return e;
        }

        public void setString(String e) {
                A.CHECK_NOT_NULL(e);
                this.e = e;
        }

        @Override
        public void copyFrom(Pointer buffer) {
                short stringSize = buffer.getShort(0);
                e = Native.toString(buffer.getByteArray(
                                SIZEOF_STRING_SIZE, stringSize));
        }

        @Override
        public void copyTo(Pointer buffer) {
                byte[] bytes = Native.toByteArray(e);
                A.CHECK(bytes.length <= Short.MAX_VALUE, "Too long string");
                buffer.setShort(0, (short) bytes.length);
                buffer.write(SIZEOF_STRING_SIZE, bytes, 0, bytes.length);
        }

        @Override
        public boolean parseFrom(Scanner sc) {
                if (sc.hasNext()) e = sc.next();
                else return false;
                return true;
        }
        
        @Override
        public PrintStream printTo(PrintStream stream) {
                A.CHECK(e.indexOf('\t') == -1, "No tabulator allowed in string");
                stream.print(e);
                return stream;
        }

        @Override
        public Memory getSharedMemory() {
                return new Memory(getSerializedSize());
        }
        
        @Override
        public int getSerializedSize() {
                return SIZEOF_STRING_SIZE + Native.toByteArray(e).length;
        }
        
        @Override
        public int hashCode() {
                final int prime = 31;
                int result = 1;
                result = prime * result + ((e == null) ? 0 : e.hashCode());
                return result;
        }

        @Override
        public boolean equals(Object obj) {
                if (this == obj)
                        return true;
                if (obj == null)
                        return false;
                if (getClass() != obj.getClass())
                        return false;
                SingleString other = (SingleString) obj;
                if (e == null) {
                        if (other.e != null)
                                return false;
                } else if (!e.equals(other.e))
                        return false;
                return true;
        }

        private String e;
}

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