plugins/properties/properties-psi-impl/src/com/intellij/lang/properties/references/PropertiesPsiCompletionUtil.java

/*
 * Copyright 2000-2014 JetBrains s.r.o.
 *
 * 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.intellij.lang.properties.references;

import com.intellij.lang.properties.IProperty;
import com.intellij.lang.properties.PropertiesFileProcessor;
import com.intellij.lang.properties.PropertiesReferenceManager;
import com.intellij.lang.properties.psi.PropertiesFile;
import com.intellij.openapi.roots.ProjectRootManager;
import com.intellij.openapi.util.Comparing;
import gnu.trove.THashSet;
import gnu.trove.TObjectHashingStrategy;

import java.util.List;
import java.util.Set;

public class PropertiesPsiCompletionUtil {
  public static void addVariantsFromFile(PropertyReferenceBase propertyReference,
                                         final PropertiesFile propertiesFile,
                                         final Set<Object> variants) {
    if (propertiesFile == null) return;
    if (!ProjectRootManager.getInstance(propertyReference.getElement().getProject()).getFileIndex().isInContent(propertiesFile.getVirtualFile())) return;
    List<? extends IProperty> properties = propertiesFile.getProperties();
    for (IProperty property : properties) {
      propertyReference.addKey(property, variants);
    }
  }

  static Set<Object> getPropertiesKeys(final PropertyReferenceBase propertyReference) {
    final Set<Object> variants = new THashSet<Object>(new TObjectHashingStrategy<Object>() {
      public int computeHashCode(final Object object) {
        if (object instanceof IProperty) {
          final String key = ((IProperty)object).getKey();
          return key == null ? 0 : key.hashCode();
        }
        else {
          return 0;
        }
      }

      public boolean equals(final Object o1, final Object o2) {
        return o1 instanceof IProperty && o2 instanceof IProperty &&
               Comparing.equal(((IProperty)o1).getKey(), ((IProperty)o2).getKey(), true);
      }
    });
    List<PropertiesFile> propertiesFileList = propertyReference.getPropertiesFiles();
    if (propertiesFileList == null) {
      PropertiesReferenceManager
        .getInstance(propertyReference.getElement().getProject()).processAllPropertiesFiles(new PropertiesFileProcessor() {
        @Override
        public boolean process(String baseName, PropertiesFile propertiesFile) {
          addVariantsFromFile(propertyReference, propertiesFile, variants);
          return true;
        }
      });
    }
    else {
      for (PropertiesFile propFile : propertiesFileList) {
        addVariantsFromFile(propertyReference, propFile, variants);
      }
    }
    return variants;
  }
}