/*
* Copyright (c) 1998-2010 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Resin Open Source is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
*
* Free Software Foundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Nam Nguyen
*/
package com.caucho.quercus.env;
import java.io.IOException;
import java.io.PrintWriter;
/**
* Represents a StringValue that is never modified.
* For compiled code.
*/
public class ConstStringValue
extends StringBuilderValue {
public static final ConstStringValue EMPTY = new ConstStringValue();
protected LongValue _longValue;
protected DoubleValue _doubleValue;
protected String _string;
protected Value _key;
protected ValueType _valueType;
protected char[] _serializeValue;
public ConstStringValue() {
super();
}
public ConstStringValue(StringBuilderValue sb) {
super(sb.getBuffer(), 0, sb.getOffset());
}
public ConstStringValue(byte[] buffer, int offset, int length) {
super(buffer, offset, length);
}
public ConstStringValue(char[] buffer, int offset, int length) {
super(buffer, offset, length);
}
/**
* Creates a new StringBuilderValue with the buffer without copying.
*/
public ConstStringValue(char[] buffer, int length) {
super(buffer, length);
}
public ConstStringValue(byte[] buffer) {
super(buffer);
}
public ConstStringValue(char ch) {
super(ch);
}
public ConstStringValue(String s) {
super(s);
_string = s;
}
public ConstStringValue(char[] s) {
super(s);
}
public ConstStringValue(char[] s, Value v1) {
super(s, v1);
}
public ConstStringValue(byte[] s, Value v1) {
super(s, v1);
}
public ConstStringValue(Value v1) {
super(v1);
}
public ConstStringValue(Value v1, Value v2) {
super(v1, v2);
}
public ConstStringValue(Value v1, Value v2, Value v3) {
super(v1, v2, v3);
}
public boolean isStatic() {
return true;
}
/**
* Converts to a long vaule
*/
@Override
public LongValue toLongValue() {
if (_longValue == null) {
_longValue = LongValue.create(super.toLong());
}
return _longValue;
}
/**
* Converts to a double vaule
*/
@Override
public DoubleValue toDoubleValue() {
if (_doubleValue == null) {
_doubleValue = new DoubleValue(super.toDouble());
}
return _doubleValue;
}
/**
* Converts to a long.
*/
@Override
public long toLong() {
return toLongValue().toLong();
}
/**
* Converts to a double.
*/
@Override
public double toDouble() {
return toDoubleValue().toDouble();
}
/**
* Returns the ValueType.
*/
@Override
public ValueType getValueType() {
if (_valueType == null) {
_valueType = super.getValueType();
}
return _valueType;
}
/**
* Converts to a key.
*/
@Override
public Value toKey() {
if (_key == null) {
_key = super.toKey();
}
return _key;
}
/**
* Serializes the value.
*/
@Override
public void serialize(Env env, StringBuilder sb) {
if (_serializeValue == null) {
StringBuilder s = new StringBuilder();
super.serialize(env, s);
int len = s.length();
_serializeValue = new char[len];
s.getChars(0, len, _serializeValue, 0);
}
sb.append(_serializeValue, 0, _serializeValue.length);
}
/**
* Generates code to recreate the expression.
*
* @param out the writer to the Java source code.
*/
@Override
public void generate(PrintWriter out)
throws IOException {
// max JVM constant string length
int maxSublen = 0xFFFE;
int len = length();
if (len == 1) {
out.print("(ConstStringValue.create((char) '");
printJavaChar(out, charAt(0));
out.print("'))");
} /*
else if (len < maxSublen) {
out.print("(new ConstStringValue(\"");
printJavaString(out, this);
out.print("\"))");
}
*/ else if (len < maxSublen) {
out.print("(new CompiledConstStringValue (\"");
printJavaString(out, this);
out.print("\", ");
toLongValue().generate(out);
out.print(", ");
toDoubleValue().generate(out);
out.print(", ");
out.print(getValueType());
out.print(", ");
Value key = toKey();
if (key instanceof LongValue) {
key.generate(out);
out.print(", ");
}
out.print(hashCode());
out.print("))");
} else {
out.print("(new ConstStringValue(new StringBuilderValue (\"");
// php/313u
for (int i = 0; i < len; i += maxSublen) {
if (i != 0) {
out.print("\").append(\"");
}
printJavaString(out, substring(i, Math.min(i + maxSublen, len)));
}
out.print("\")))");
}
}
@Override
public String toString() {
if (_string == null) {
_string = super.toString();
}
return _string;
}
}