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/*
 * Copyright 2014 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.resources.gss.ast;

import com.google.gwt.core.ext.Generator;
import com.google.gwt.thirdparty.common.css.SourceCodeLocation;
import com.google.gwt.thirdparty.common.css.compiler.ast.CssValueNode;
import com.google.gwt.thirdparty.guava.common.base.Strings;

import java.util.Arrays;
import java.util.List;

/**
 * Represents a sequence of no-arg method invocations.
 */
public class CssDotPathNode extends CssValueNode {

  public static String resolveExpression(String instance, String path, String prefix, String suffix) {
    String expression = path.replace(".", "().") + "()";

    if (!Strings.isNullOrEmpty(instance)) {
      expression = instance + "." + expression;
    }

    if (!Strings.isNullOrEmpty(prefix)) {
      expression = "\"" + Generator.escape(prefix) + "\" + " + expression;
    }

    if (!Strings.isNullOrEmpty(suffix)) {
      expression += " + \"" + Generator.escape(suffix) + "\"";
    }

    return expression;
  }

  private String suffix;
  private String prefix;
  private String path;
  private String instance;

  public CssDotPathNode(String dotPath, String prefix, String suffix, SourceCodeLocation sourceCodeLocation) {
    this(null, dotPath, prefix, suffix, sourceCodeLocation);
  }

  public CssDotPathNode(String instance, String dotPath, String prefix, String suffix,
      SourceCodeLocation sourceCodeLocation) {
    super(resolveExpression(instance, dotPath, prefix, suffix), sourceCodeLocation);

    this.prefix = prefix;
    this.suffix = suffix;
    this.path = dotPath;
    this.instance = instance;
  }

  @Override
  public CssValueNode deepCopy() {
    return new CssDotPathNode(instance, path, prefix, suffix, getSourceCodeLocation());
  }

  public String getPath() {
    return path;
  }

  public String getSuffix() {
    return suffix;
  }

  public String getPrefix() {
    return prefix;
  }

  public String getInstance() {
    return instance;
  }

  public List getPathElements() {
    return Arrays.asList(path.split("\\."));
  }
}




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