org.springframework.ide.eclipse.core.java.classreading.CachingJdtMetadataReaderFactory.java Source code

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Here is the source code for org.springframework.ide.eclipse.core.java.classreading.CachingJdtMetadataReaderFactory.java

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/*******************************************************************************
 * Copyright (c) 2012, 2014 Spring IDE Developers
 * 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
 * https://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     Spring IDE Developers - initial API and implementation
 *******************************************************************************/
package org.springframework.ide.eclipse.core.java.classreading;

import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

import org.eclipse.jdt.core.IJavaProject;
import org.springframework.core.io.Resource;
import org.springframework.core.type.classreading.MetadataReader;
import org.springframework.core.type.classreading.MetadataReaderFactory;

/**
 * @author Martin Lippert
 * @since 3.2.0
 */
public class CachingJdtMetadataReaderFactory implements MetadataReaderFactory {

    private final JdtMetadataReaderFactory factory;
    private final Map<String, MetadataReader> cache = new HashMap<String, MetadataReader>();

    public CachingJdtMetadataReaderFactory(IJavaProject project, ClassLoader classloader) {
        this.factory = new JdtMetadataReaderFactory(project, classloader);
    }

    public MetadataReader getMetadataReader(String className) throws IOException {
        synchronized (cache) {
            if (!cache.containsKey(className)) {
                cache.put(className, factory.getMetadataReader(className));
            }
        }

        return cache.get(className);
    }

    public MetadataReader getMetadataReader(Resource resource) throws IOException {
        throw new JdtMetadataReaderException("'getMetadataReader' is not supported");
    }

}