/*
 * Copyright (C) 2011 The Android Open Source Project
 *
 * 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.android.ide.eclipse.ddms;

import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IConfigurationElement;

import java.util.ArrayList;
import java.util.List;

public class JavaSourceRevealer {
    private static final String SOURCE_REVEALER_EXTENSION_ID =
            "com.android.ide.eclipse.ddms.sourceRevealer"; //$NON-NLS-1$

    private static List<ISourceRevealer> sSourceRevealers = instantiateSourceRevealers();

    /** Instantiate all providers of the {@link #SOURCE_REVEALER_EXTENSION_ID} extension. */
    private static List<ISourceRevealer> instantiateSourceRevealers() {
        IConfigurationElement[] configElements =
                DdmsPlugin.getDefault().findConfigElements(SOURCE_REVEALER_EXTENSION_ID);

        List<ISourceRevealer> providers = new ArrayList<ISourceRevealer>();

        for (IConfigurationElement configElement : configElements) {
            // instantiate the class
            Object obj = null;
            try {
                obj = configElement.createExecutableExtension("class"); //$NON-NLS-1$
            } catch (CoreException e) {
                // ignore exception while instantiating this class.
            }

            if (obj instanceof ISourceRevealer) {
                providers.add((ISourceRevealer) obj);
            }
        }

        return providers;
    }

    public static boolean reveal(String applicationName, String className, int line) {
        for (ISourceRevealer revealer : sSourceRevealers) {
            try {
                if (revealer.reveal(applicationName, className, line)) {
                    return true;
                }
            } catch (Throwable t) {
                // ignore, we'll just not use this implementation.
            }
        }

        return false;
    }

    public static boolean revealMethod(String fqmn, String fileName, int linenumber,
            String perspective) {
        for (ISourceRevealer revealer : sSourceRevealers) {
            try {
                if (revealer.revealMethod(fqmn, fileName, linenumber, perspective)) {
                    return true;
                }
            } catch (Throwable t) {
                // ignore, we'll just not use this implementation.
            }
        }

        return false;
    }
}