io.spring.boot.development.eclipse.visitors.SpringFactories.java Source code

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Here is the source code for io.spring.boot.development.eclipse.visitors.SpringFactories.java

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/*
 * Copyright 2016 the original author or authors
 *
 * 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.spring.boot.development.eclipse.visitors;

import java.util.ArrayList;
import java.util.List;
import java.util.Properties;
import java.util.StringTokenizer;

import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IProject;
import org.eclipse.jdt.core.IJavaProject;
import org.eclipse.jdt.core.IPackageFragmentRoot;
import org.eclipse.jdt.core.JavaCore;

/**
 * Programmatic representation of a project's {@code META-INF/spring.factories} file.
 *
 * @author Andy Wilkinson
 */
class SpringFactories {

    private final Properties properties;

    SpringFactories(Properties properties) {
        this.properties = properties;
    }

    static SpringFactories find(IProject project) {
        IJavaProject javaProject = JavaCore.create(project);
        try {
            for (IPackageFragmentRoot root : javaProject.getAllPackageFragmentRoots()) {
                if (root.getKind() == IPackageFragmentRoot.K_SOURCE) {
                    IFile springFactories = project.getFile(
                            root.getResource().getProjectRelativePath().append("META-INF/spring.factories"));
                    if (springFactories.exists()) {
                        Properties properties = new Properties();
                        properties.load(springFactories.getContents());
                        return new SpringFactories(properties);
                    }
                }
            }
        } catch (Exception ex) {
            throw new RuntimeException("Failure while finding spring.factories", ex);
        }
        return null;
    }

    List<String> get(String key) {
        String value = this.properties.getProperty(key);
        List<String> values = new ArrayList<String>();
        if (value != null) {
            StringTokenizer tokenizer = new StringTokenizer(value, ",");
            while (tokenizer.hasMoreTokens()) {
                values.add(tokenizer.nextToken().trim());
            }
        }
        return values;
    }

}