org.eclipse.xtext.common.types.xtext.ui.IntersectingJavaSearchScope.java Source code

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Here is the source code for org.eclipse.xtext.common.types.xtext.ui.IntersectingJavaSearchScope.java

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/*******************************************************************************
 * Copyright (c) 2010 itemis AG (http://www.itemis.eu) and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *******************************************************************************/
package org.eclipse.xtext.common.types.xtext.ui;

import java.util.Arrays;
import java.util.Collection;

import org.apache.log4j.Logger;
import org.eclipse.core.runtime.IPath;
import org.eclipse.jdt.core.IJavaElement;
import org.eclipse.jdt.core.search.IJavaSearchScope;

import com.google.common.collect.Sets;

/**
 * @author Sebastian Zarnekow - Initial contribution and API
 */
public class IntersectingJavaSearchScope implements IJavaSearchScope {

    private static final Logger log = Logger.getLogger(IntersectingJavaSearchScope.class);

    private final IJavaSearchScope[] scopes;
    private final boolean[] dontAsk;

    public IntersectingJavaSearchScope(IJavaSearchScope... scopes) {
        this.scopes = scopes;
        this.dontAsk = new boolean[scopes.length];
    }

    @Override
    public boolean encloses(String resourcePath) {
        boolean result = false;
        for (int i = 0; i < scopes.length; i++) {
            if (!dontAsk[i]) {
                IJavaSearchScope scope = scopes[i];
                try {
                    if (!scope.encloses(resourcePath))
                        return false;
                    result = true;
                } catch (Exception e) {
                    dontAsk[i] = true;
                    log.info("Exception in JDT code", e);
                }
            }
        }
        return result;
    }

    @Override
    public boolean encloses(IJavaElement element) {
        boolean result = false;
        for (int i = 0; i < scopes.length; i++) {
            if (!dontAsk[i]) {
                IJavaSearchScope scope = scopes[i];
                try {
                    if (!scope.encloses(element))
                        return false;
                    result = true;
                } catch (Exception e) {
                    dontAsk[i] = true;
                    log.info("Exception in JDT code", e);
                }
            }
        }
        return result;
    }

    @Override
    public IPath[] enclosingProjectsAndJars() {
        if (scopes.length == 0)
            return new IPath[0];
        if (scopes.length == 1)
            return scopes[0].enclosingProjectsAndJars();
        Collection<IPath> result = null;
        for (IJavaSearchScope scope : scopes) {
            if (result == null) {
                result = Sets.newLinkedHashSet(Arrays.asList(scope.enclosingProjectsAndJars()));
            } else {
                result.retainAll(Arrays.asList(scope.enclosingProjectsAndJars()));
            }
        }
        if (result == null)
            return new IPath[0];
        return result.toArray(new IPath[result.size()]);
    }

    @Override
    @Deprecated
    public boolean includesBinaries() {
        for (IJavaSearchScope scope : scopes)
            if (!scope.includesBinaries())
                return false;
        return true;
    }

    @Override
    @Deprecated
    public boolean includesClasspaths() {
        for (IJavaSearchScope scope : scopes)
            if (!scope.includesClasspaths())
                return false;
        return true;
    }

    @Override
    @Deprecated
    public void setIncludesBinaries(boolean includesBinaries) {
        for (IJavaSearchScope scope : scopes)
            scope.setIncludesBinaries(includesBinaries);
    }

    @Override
    @Deprecated
    public void setIncludesClasspaths(boolean includesClasspaths) {
        for (IJavaSearchScope scope : scopes)
            scope.setIncludesClasspaths(includesClasspaths);
    }

}