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The Apache Commons Codec package contains simple encoder and decoders for various formats such as Base64 and Hexadecimal. In addition to these widely used encoders and decoders, the codec package also maintains a collection of phonetic encoding utilities.

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/*   Copyright 2004 The Apache Software Foundation
 *
 *   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 org.apache.xmlbeans.impl.jam.internal;

import org.apache.xmlbeans.impl.jam.mutable.MClass;
import org.apache.xmlbeans.impl.jam.provider.JamClassBuilder;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * A ClassBuilder that doesn't do any lazy building - it is just a cache
 * of classes that are used when asked to build one.  This is used by
 * JamXmlReader, which does all of it's reading and building in a single
 * pass.
 *
 * @author Patrick Calahan <email: pcal-at-bea-dot-com>
 */
public class CachedClassBuilder extends JamClassBuilder {

  // ========================================================================
  // Variables

  private Map mQcname2jclass = null;
  private List mClassNames = new ArrayList();

  // ========================================================================
  // Constructors

  public CachedClassBuilder() {}

  // ========================================================================
  // JamClassBuilder implementation

  public MClass build(String packageName, String className) {
    if (mQcname2jclass == null) return null;
    if (packageName.trim().length() > 0) {
      className = packageName+'.'+className;
    }
    return (MClass)mQcname2jclass.get(className);
  }

  // ========================================================================
  // Public methods

  public MClass createClassToBuild(String packageName,
                                   String className,
                                   String[] importSpecs) {
    String qualifiedName;
    if (packageName.trim().length() > 0) {
      qualifiedName = packageName+'.'+className;
    } else {
      qualifiedName = className;
    }
    MClass out;
    if (mQcname2jclass != null) {
      out = (MClass)mQcname2jclass.get(qualifiedName);
      if (out != null) return out;
    } else {
      mQcname2jclass = new HashMap();
    }
    out = super.createClassToBuild(packageName,className, importSpecs);
    mQcname2jclass.put(qualifiedName,out);
    mClassNames.add(qualifiedName);
    return out;
  }

  public String[] getClassNames() {
    String[] out = new String[mClassNames.size()];
    mClassNames.toArray(out);
    return out;
  }
}