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/*
 * Based on JUEL 2.2.1 code, 2006-2009 Odysseus Software GmbH
 *
 * Licensed 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.activiti.engine.impl.juel;

import org.activiti.engine.impl.javax.el.ELContext;


public final class AstString extends AstLiteral {
	private final String value;

	public AstString(String value) {
		this.value = value;
	}

	@Override 
	public Object eval(Bindings bindings, ELContext context) {
		return value;
	}

	@Override
	public String toString() {
		return "\"" + value + "\"";
	}	

	@Override 
	public void appendStructure(StringBuilder b, Bindings bindings) {
		b.append("'");
		int length = value.length();
		for (int i = 0; i < length; i++) {
			char c = value.charAt(i);
			if (c == '\\' || c == '\'') {
				b.append('\\');
			}
			b.append(c);
		}
		b.append("'");
	}
}