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/*
* 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.psi;
import com.intellij.lang.Language;
import com.intellij.openapi.application.ApplicationManager;
import com.intellij.openapi.diagnostic.Logger;
import com.intellij.openapi.extensions.AbstractExtensionPointBean;
import com.intellij.openapi.extensions.ExtensionPointName;
import com.intellij.patterns.ElementPattern;
import com.intellij.patterns.ElementPatternBean;
import com.intellij.patterns.StandardPatterns;
import com.intellij.util.KeyedLazyInstance;
import com.intellij.util.NullableFunction;
import com.intellij.util.containers.ContainerUtil;
import com.intellij.util.xmlb.annotations.AbstractCollection;
import com.intellij.util.xmlb.annotations.Attribute;
import com.intellij.util.xmlb.annotations.Property;
import com.intellij.util.xmlb.annotations.Tag;
import org.jetbrains.annotations.Nullable;
import java.util.List;
/**
* Registers a {@link PsiReferenceProvider} in plugin.xml
*/
public class PsiReferenceProviderBean extends AbstractExtensionPointBean implements KeyedLazyInstance<PsiReferenceProviderBean> {
public static final ExtensionPointName<PsiReferenceProviderBean> EP_NAME =
new ExtensionPointName<PsiReferenceProviderBean>("com.intellij.psi.referenceProvider");
@Attribute("language")
public String language = Language.ANY.getID();
@Attribute("providerClass")
public String className;
@Tag("description")
public String description;
@Property(surroundWithTag = false)
@AbstractCollection(surroundWithTag = false)
public ElementPatternBean[] patterns;
public String getDescription() {
return description;
}
private static final Logger LOG = Logger.getInstance("#com.intellij.psi.PsiReferenceProviderBean");
public PsiReferenceProvider instantiate() {
try {
return (PsiReferenceProvider)instantiate(className, ApplicationManager.getApplication().getPicoContainer());
}
catch (ClassNotFoundException e) {
LOG.error(e);
}
return null;
}
private static final NullableFunction<ElementPatternBean,ElementPattern<? extends PsiElement>> PATTERN_NULLABLE_FUNCTION = new NullableFunction<ElementPatternBean, ElementPattern<? extends PsiElement>>() {
@Override
public ElementPattern<? extends PsiElement> fun(ElementPatternBean elementPatternBean) {
return elementPatternBean.compilePattern();
}
};
@Nullable
public ElementPattern<PsiElement> createElementPattern() {
if (patterns.length > 1) {
List<ElementPattern<? extends PsiElement>> list = ContainerUtil.mapNotNull(patterns, PATTERN_NULLABLE_FUNCTION);
//noinspection unchecked
return StandardPatterns.or(list.toArray(new ElementPattern[list.size()]));
}
else if (patterns.length == 1) {
return patterns[0].compilePattern();
}
else {
LOG.error("At least one pattern should be specified");
return null;
}
}
@Override
public String getKey() {
return language;
}
@Override
public PsiReferenceProviderBean getInstance() {
return this;
}
}
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