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/*
* Copyright 2000-2009 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.usages.impl;
import com.intellij.openapi.fileEditor.FileEditorLocation;
import com.intellij.usages.Usage;
import com.intellij.usages.UsagePresentation;
import org.jetbrains.annotations.NotNull;
/**
* @author cdr
*/
public class NullUsage implements Usage {
public static final NullUsage INSTANCE = new NullUsage();
private NullUsage() {
}
@Override
@NotNull
public UsagePresentation getPresentation() {
throw new IllegalAccessError();
}
@Override
public boolean isValid() {
return false;
}
@Override
public boolean isReadOnly() {
return false;
}
@Override
public FileEditorLocation getLocation() {
return null;
}
@Override
public void selectInEditor() {
}
@Override
public void highlightInEditor() {
}
@Override
public void navigate(final boolean requestFocus) {
}
@Override
public boolean canNavigate() {
return false;
}
@Override
public boolean canNavigateToSource() {
return false;
}
}
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