/*
 * Copyright 2008 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.core.ext.soyc.impl;

import com.google.gwt.core.ext.soyc.ClassMember;
import com.google.gwt.core.ext.soyc.Member;
import com.google.gwt.core.ext.soyc.MethodMember;
import com.google.gwt.dev.jjs.Correlation;
import com.google.gwt.dev.jjs.Correlation.Axis;
import com.google.gwt.dev.jjs.ast.JMethod;
import com.google.gwt.dev.jjs.ast.JType;

import java.util.Collections;
import java.util.SortedSet;
import java.util.TreeSet;

/**
 * An implementation of MethodMember.
 */
public class StandardMethodMember extends AbstractMemberWithDependencies
    implements MethodMember {
  private final SortedSet<String> aliasesView;
  private final ClassMember enclosing;
  private final String sourceName;
  private final SortedSet<MethodMember> overridesView;

  /**
   * Constructed by {@link MemberFactory#get(JMethod)}.
   */
  public StandardMethodMember(MemberFactory factory, JMethod method) {
    super(method.getSourceInfo());
    this.enclosing = factory.get(method.getEnclosingType());

    StringBuilder sb = new StringBuilder();
    sb.append(method.getEnclosingType().getName()).append("::");
    sb.append(method.getName()).append("(");
    for (JType type : method.getOriginalParamTypes()) {
      sb.append(type.getJsniSignatureName());
    }
    sb.append(")");
    sb.append(method.getOriginalReturnType().getJsniSignatureName());
    this.sourceName = sb.toString();

    SortedSet<String> aliases = new TreeSet<String>();
    for (Correlation c : method.getSourceInfo().getAllCorrelations(
        Axis.JS_ALIAS)) {
      aliases.add(c.getName().getShortIdent());
    }
    aliasesView = Collections.unmodifiableSortedSet(aliases);

    SortedSet<MethodMember> overrides = new TreeSet<MethodMember>(
        Member.SOURCE_NAME_COMPARATOR);
    for (JMethod override : method.getOverrides()) {
      overrides.add(factory.get(override));
    }
    overridesView = Collections.unmodifiableSortedSet(overrides);
  }

  public ClassMember getEnclosing() {
    return enclosing;
  }

  public SortedSet<String> getJsAliases() {
    return aliasesView;
  }

  public SortedSet<MethodMember> getOverrides() {
    return overridesView;
  }

  @Override
  public String getSourceName() {
    return sourceName;
  }

  /**
   * For debugging use only.
   */
  @Override
  public String toString() {
    return "MethodMember " + sourceName;
  }
}