org.apache.xmlbeans.impl.jam.internal.JamPrinter Maven / Gradle / Ivy

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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.JAnnotation;
import org.apache.xmlbeans.impl.jam.JClass;
import org.apache.xmlbeans.impl.jam.JConstructor;
import org.apache.xmlbeans.impl.jam.JElement;
import org.apache.xmlbeans.impl.jam.JMethod;
import org.apache.xmlbeans.impl.jam.JamClassIterator;

import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;

/**
 * Utility class for printing out a JAM.
 *
 * @author Patrick Calahan <email: pcal-at-bea-dot-com>
 */
public class JamPrinter {

  // ========================================================================
  // Factory

  public static JamPrinter newInstance() {
    return new JamPrinter();
  }

  private JamPrinter() {
  }

  private static final String INDENT = "  ";

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

  public void print(JElement root, PrintWriter out) {
    print(root, 0, out);
  }

  public void print(JamClassIterator iter, PrintWriter out) {
    while(iter.hasNext()) {
      JClass clazz = iter.nextClass();
      out.println("------------------------------");
      out.println(clazz.getQualifiedName());
      out.println("------------------------------");
      print(clazz,out);
      out.println();
    }
  }

  // ========================================================================
  // Private methods

  private void print(JElement a, int indent, PrintWriter out) {
    indent(indent, out);
    out.print("[");
    out.print(getTypeKey(a));
    out.print("] ");
    if (a instanceof JMethod) {
      out.print(((JMethod) a).getReturnType().getFieldDescriptor());
      out.print(" ");
      out.println(a.getSimpleName());
    } else {
      out.println(a.getSimpleName());
    }
    indent++;
    // print out the annotations
    /*JAnnotation[] atts = a.getAnnotations();
    if (atts != null) print(atts, indent, out);
    // now recursively print out the children
    JElement[] children = getChildrenFor(a);
    if (children != null) {
      for (int i = 0; i < children.length; i++) {
        if (children[i] != null) print(children[i], indent, out);
      }
    }
    */
  }

  
  private void print(JAnnotation[] atts, int indent, PrintWriter out) {
    for (int i = 0; i < atts.length; i++) {
      indent(indent, out);
      out.print("<");
      out.print(getTypeKey(atts[i]));
      out.print("> ");
      out.print(atts[i].getSimpleName());
    }
  }

  private void indent(int indent, PrintWriter out) {
    for (int i = 0; i < indent; i++) out.print(INDENT);
  }

  private String getTypeKey(Object o) {
    if (o == null) return "[?UNKNOWN!]";
    String type = o.getClass().getName();
    int lastDot = type.lastIndexOf(".");
    if (lastDot != -1 && lastDot + 1 < type.length()) {
      type = type.substring(lastDot + 1);
    }
    return type;
  }


  // this is quite gross, but we don't want to expose getChildren() to
  // the public any more
  private static JElement[] getChildrenFor(JElement parent) {
    Collection list = new ArrayList();
    if (parent instanceof JClass) {
      list.addAll(Arrays.asList(((JClass) parent).getDeclaredFields()));
      list.addAll(Arrays.asList(((JClass) parent).getDeclaredMethods()));
      list.addAll(Arrays.asList(((JClass) parent).getConstructors()));
      list.addAll(Arrays.asList(((JClass) parent).getClasses()));
    } else if (parent instanceof JConstructor) {
      list.addAll(Arrays.asList(((JConstructor) parent).getParameters()));
    } else if (parent instanceof JMethod) {
      list.addAll(Arrays.asList(((JMethod) parent).getParameters()));
    }
    JElement[] out = new JElement[list.size()];
    list.toArray(out);
    return out;
  }
}