/*
 * Copyright 2011 Google Inc.
 *
 * 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 com.google.gwt.codegen.rebind;

import com.google.gwt.codegen.server.AbortablePrintWriter;
import com.google.gwt.codegen.server.CodeGenContext;
import com.google.gwt.codegen.server.JavaSourceWriterBuilder;
import com.google.gwt.core.ext.GeneratorContext;
import com.google.gwt.core.ext.TreeLogger;

import java.io.PrintWriter;

/**
 * {@link CodeGenContext} implementation for use within a GWT
 * {@link com.google.gwt.core.ext.Generator}.
 * <p>
 * Experimental API - subject to change.
 */
public class GwtCodeGenContext implements CodeGenContext {

  private final TreeLogger logger;
  private final GeneratorContext ctx;

  /**
   * @param logger
   * @param ctx
   */
  public GwtCodeGenContext(TreeLogger logger, GeneratorContext ctx) {
    this.logger = logger;
    this.ctx = ctx;
  }

  public JavaSourceWriterBuilder addClass(String pkgName, String className) {
    return addClass(null, pkgName, className);
  }

  public JavaSourceWriterBuilder addClass(String superPath, String pkgName, String className) {
    String superPkg = superPath == null ? pkgName : superPath + "." + pkgName;
    final PrintWriter pw = ctx.tryCreate(logger, superPkg, className);
    if (pw == null) {
      return null;
    }
    return new JavaSourceWriterBuilder(new AbortablePrintWriter(pw) {
      @Override
      protected void onClose(boolean aborted) {
        if (!aborted) {
          ctx.commit(logger, pw);
        }
      }
    }, pkgName, className);
  }

  public void error(String msg) {
    logger.log(TreeLogger.ERROR, msg);
  }

  public void error(String msg, Throwable cause) {
    logger.log(TreeLogger.ERROR, msg, cause);
  }

  public void error(Throwable cause) {
    logger.log(TreeLogger.ERROR, cause.getMessage(), cause);
  }

  public void warn(String msg) {
    logger.log(TreeLogger.WARN, msg);
  }

  public void warn(String msg, Throwable cause) {
    logger.log(TreeLogger.WARN, msg, cause);
  }

  public void warn(Throwable cause) {
    logger.log(TreeLogger.WARN, cause.getMessage(), cause);
  }
}