io.takari.maven.plugins.compile.jdt.ClasspathEntryCache.java Source code

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Here is the source code for io.takari.maven.plugins.compile.jdt.ClasspathEntryCache.java

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/**
 * Copyright (c) 2014 Takari, Inc.
 * 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 io.takari.maven.plugins.compile.jdt;

import io.takari.maven.plugins.compile.jdt.classpath.ClasspathDirectory;
import io.takari.maven.plugins.compile.jdt.classpath.ClasspathJar;
import io.takari.maven.plugins.compile.jdt.classpath.DependencyClasspathEntry;

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

import javax.inject.Inject;
import javax.inject.Named;

import org.apache.maven.execution.scope.MojoExecutionScoped;
import org.apache.maven.project.MavenProject;

@Named
@MojoExecutionScoped
public class ClasspathEntryCache {

    private static final Map<File, DependencyClasspathEntry> CACHE = new HashMap<>();

    @Inject
    public ClasspathEntryCache(MavenProject project) {
        synchronized (CACHE) {
            // this is only needed for unit tests, but won't hurt in general
            CACHE.remove(normalize(new File(project.getBuild().getOutputDirectory())));
            CACHE.remove(normalize(new File(project.getBuild().getTestOutputDirectory())));
        }
    }

    public DependencyClasspathEntry get(File location) {
        location = normalize(location);
        synchronized (CACHE) {
            DependencyClasspathEntry entry = null;
            if (!CACHE.containsKey(location)) {
                if (location.isDirectory()) {
                    entry = ClasspathDirectory.create(location);
                } else if (location.isFile()) {
                    try {
                        entry = ClasspathJar.create(location);
                    } catch (IOException e) {
                        // not a zip/jar, ignore
                    }
                }
                CACHE.put(location, entry);
            } else {
                entry = CACHE.get(location);
            }
            return entry;
        }
    }

    private File normalize(File location) {
        try {
            location = location.getCanonicalFile();
        } catch (IOException e1) {
            location = location.getAbsoluteFile();
        }
        return location;
    }
}