/*
 * Copyright (C) 2011 Red Hat, Inc. and/or its affiliates.
 *
 * 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.jboss.errai.codegen.util;

import org.jboss.errai.codegen.Context;
import org.jboss.errai.codegen.Statement;
import org.jboss.errai.codegen.meta.MetaClass;
import org.jboss.errai.codegen.meta.MetaClassFactory;

/**
 * An empty statement. Use {@link #INSTANCE} to obtain an instance of this type.
 *
 * @author Jonathan Fuerth <jfuerth@redhat.com>
 * @author Mike Brock <cbrock@redhat.com>
 */
public class EmptyStatement implements Statement {

  /**
   * Sharable empty statement instance.
   */
  public static final Statement INSTANCE = new EmptyStatement();

  /**
   * Private constructor to enforce singletonness of this class.
   */
  private EmptyStatement() {
  }

  /**
   * Returns the empty string.
   */
  @Override
  public String generate(Context context) {
    return "";
  }

  /**
   * Always returns the MetaClass for java.lang.Object.
   */
  @Override
  public MetaClass getType() {
    return MetaClassFactory.get(Object.class);
  }
}
