/*
 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You 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.commons.compress.harmony.unpack200;

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

import org.apache.commons.compress.harmony.pack200.Pack200Exception;

/**
 * Stores a mapping from attribute names to their corresponding layout types. Note that names of attribute layouts and
 * their formats are <em>not</em> internationalized, and should not be translated.
 */
public class AttributeLayoutMap {

    // Create all the default AttributeLayouts here
    private static AttributeLayout[] getDefaultAttributeLayouts() throws Pack200Exception {
        return new AttributeLayout[] {
            new AttributeLayout(AttributeLayout.ACC_PUBLIC, AttributeLayout.CONTEXT_CLASS, "", 0),
            new AttributeLayout(AttributeLayout.ACC_PUBLIC, AttributeLayout.CONTEXT_FIELD, "", 0),
            new AttributeLayout(AttributeLayout.ACC_PUBLIC, AttributeLayout.CONTEXT_METHOD, "", 0),
            new AttributeLayout(AttributeLayout.ACC_PRIVATE, AttributeLayout.CONTEXT_CLASS, "", 1),
            new AttributeLayout(AttributeLayout.ACC_PRIVATE, AttributeLayout.CONTEXT_FIELD, "", 1),
            new AttributeLayout(AttributeLayout.ACC_PRIVATE, AttributeLayout.CONTEXT_METHOD, "", 1),
            new AttributeLayout(AttributeLayout.ATTRIBUTE_LINE_NUMBER_TABLE, AttributeLayout.CONTEXT_CODE, "NH[PHH]",
                1),

            new AttributeLayout(AttributeLayout.ACC_PROTECTED, AttributeLayout.CONTEXT_CLASS, "", 2),
            new AttributeLayout(AttributeLayout.ACC_PROTECTED, AttributeLayout.CONTEXT_FIELD, "", 2),
            new AttributeLayout(AttributeLayout.ACC_PROTECTED, AttributeLayout.CONTEXT_METHOD, "", 2),
            new AttributeLayout(AttributeLayout.ATTRIBUTE_LOCAL_VARIABLE_TABLE, AttributeLayout.CONTEXT_CODE,
                "NH[PHOHRUHRSHH]", 2),

            new AttributeLayout(AttributeLayout.ACC_STATIC, AttributeLayout.CONTEXT_CLASS, "", 3),
            new AttributeLayout(AttributeLayout.ACC_STATIC, AttributeLayout.CONTEXT_FIELD, "", 3),
            new AttributeLayout(AttributeLayout.ACC_STATIC, AttributeLayout.CONTEXT_METHOD, "", 3),
            new AttributeLayout(AttributeLayout.ATTRIBUTE_LOCAL_VARIABLE_TYPE_TABLE, AttributeLayout.CONTEXT_CODE,
                "NH[PHOHRUHRSHH]", 3),

            new AttributeLayout(AttributeLayout.ACC_FINAL, AttributeLayout.CONTEXT_CLASS, "", 4),
            new AttributeLayout(AttributeLayout.ACC_FINAL, AttributeLayout.CONTEXT_FIELD, "", 4),
            new AttributeLayout(AttributeLayout.ACC_FINAL, AttributeLayout.CONTEXT_METHOD, "", 4),
            new AttributeLayout(AttributeLayout.ACC_SYNCHRONIZED, AttributeLayout.CONTEXT_CLASS, "", 5),
            new AttributeLayout(AttributeLayout.ACC_SYNCHRONIZED, AttributeLayout.CONTEXT_FIELD, "", 5),
            new AttributeLayout(AttributeLayout.ACC_SYNCHRONIZED, AttributeLayout.CONTEXT_METHOD, "", 5),
            new AttributeLayout(AttributeLayout.ACC_VOLATILE, AttributeLayout.CONTEXT_CLASS, "", 6),
            new AttributeLayout(AttributeLayout.ACC_VOLATILE, AttributeLayout.CONTEXT_FIELD, "", 6),
            new AttributeLayout(AttributeLayout.ACC_VOLATILE, AttributeLayout.CONTEXT_METHOD, "", 6),
            new AttributeLayout(AttributeLayout.ACC_TRANSIENT, AttributeLayout.CONTEXT_CLASS, "", 7),
            new AttributeLayout(AttributeLayout.ACC_TRANSIENT, AttributeLayout.CONTEXT_FIELD, "", 7),
            new AttributeLayout(AttributeLayout.ACC_TRANSIENT, AttributeLayout.CONTEXT_METHOD, "", 7),
            new AttributeLayout(AttributeLayout.ACC_NATIVE, AttributeLayout.CONTEXT_CLASS, "", 8),
            new AttributeLayout(AttributeLayout.ACC_NATIVE, AttributeLayout.CONTEXT_FIELD, "", 8),
            new AttributeLayout(AttributeLayout.ACC_NATIVE, AttributeLayout.CONTEXT_METHOD, "", 8),
            new AttributeLayout(AttributeLayout.ACC_INTERFACE, AttributeLayout.CONTEXT_CLASS, "", 9),
            new AttributeLayout(AttributeLayout.ACC_INTERFACE, AttributeLayout.CONTEXT_FIELD, "", 9),
            new AttributeLayout(AttributeLayout.ACC_INTERFACE, AttributeLayout.CONTEXT_METHOD, "", 9),
            new AttributeLayout(AttributeLayout.ACC_ABSTRACT, AttributeLayout.CONTEXT_CLASS, "", 10),
            new AttributeLayout(AttributeLayout.ACC_ABSTRACT, AttributeLayout.CONTEXT_FIELD, "", 10),
            new AttributeLayout(AttributeLayout.ACC_ABSTRACT, AttributeLayout.CONTEXT_METHOD, "", 10),
            new AttributeLayout(AttributeLayout.ACC_STRICT, AttributeLayout.CONTEXT_CLASS, "", 11),
            new AttributeLayout(AttributeLayout.ACC_STRICT, AttributeLayout.CONTEXT_FIELD, "", 11),
            new AttributeLayout(AttributeLayout.ACC_STRICT, AttributeLayout.CONTEXT_METHOD, "", 11),
            new AttributeLayout(AttributeLayout.ACC_SYNTHETIC, AttributeLayout.CONTEXT_CLASS, "", 12),
            new AttributeLayout(AttributeLayout.ACC_SYNTHETIC, AttributeLayout.CONTEXT_FIELD, "", 12),
            new AttributeLayout(AttributeLayout.ACC_SYNTHETIC, AttributeLayout.CONTEXT_METHOD, "", 12),
            new AttributeLayout(AttributeLayout.ACC_ANNOTATION, AttributeLayout.CONTEXT_CLASS, "", 13),
            new AttributeLayout(AttributeLayout.ACC_ANNOTATION, AttributeLayout.CONTEXT_FIELD, "", 13),
            new AttributeLayout(AttributeLayout.ACC_ANNOTATION, AttributeLayout.CONTEXT_METHOD, "", 13),
            new AttributeLayout(AttributeLayout.ACC_ENUM, AttributeLayout.CONTEXT_CLASS, "", 14),
            new AttributeLayout(AttributeLayout.ACC_ENUM, AttributeLayout.CONTEXT_FIELD, "", 14),
            new AttributeLayout(AttributeLayout.ACC_ENUM, AttributeLayout.CONTEXT_METHOD, "", 14),
            new AttributeLayout(AttributeLayout.ATTRIBUTE_SOURCE_FILE, AttributeLayout.CONTEXT_CLASS, "RUNH", 17),
            new AttributeLayout(AttributeLayout.ATTRIBUTE_CONSTANT_VALUE, AttributeLayout.CONTEXT_FIELD, "KQH", 17),
            new AttributeLayout(AttributeLayout.ATTRIBUTE_CODE, AttributeLayout.CONTEXT_METHOD, "", 17),
            new AttributeLayout(AttributeLayout.ATTRIBUTE_ENCLOSING_METHOD, AttributeLayout.CONTEXT_CLASS, "RCHRDNH",
                18),
            new AttributeLayout(AttributeLayout.ATTRIBUTE_EXCEPTIONS, AttributeLayout.CONTEXT_METHOD, "NH[RCH]", 18),
            new AttributeLayout(AttributeLayout.ATTRIBUTE_SIGNATURE, AttributeLayout.CONTEXT_CLASS, "RSH", 19),
            new AttributeLayout(AttributeLayout.ATTRIBUTE_SIGNATURE, AttributeLayout.CONTEXT_FIELD, "RSH", 19),
            new AttributeLayout(AttributeLayout.ATTRIBUTE_SIGNATURE, AttributeLayout.CONTEXT_METHOD, "RSH", 19),
            new AttributeLayout(AttributeLayout.ATTRIBUTE_DEPRECATED, AttributeLayout.CONTEXT_CLASS, "", 20),
            new AttributeLayout(AttributeLayout.ATTRIBUTE_DEPRECATED, AttributeLayout.CONTEXT_FIELD, "", 20),
            new AttributeLayout(AttributeLayout.ATTRIBUTE_DEPRECATED, AttributeLayout.CONTEXT_METHOD, "", 20),
            new AttributeLayout(AttributeLayout.ATTRIBUTE_RUNTIME_VISIBLE_ANNOTATIONS, AttributeLayout.CONTEXT_CLASS,
                "*", 21),
            new AttributeLayout(AttributeLayout.ATTRIBUTE_RUNTIME_VISIBLE_ANNOTATIONS, AttributeLayout.CONTEXT_FIELD,
                "*", 21),
            new AttributeLayout(AttributeLayout.ATTRIBUTE_RUNTIME_VISIBLE_ANNOTATIONS, AttributeLayout.CONTEXT_METHOD,
                "*", 21),
            new AttributeLayout(AttributeLayout.ATTRIBUTE_RUNTIME_INVISIBLE_ANNOTATIONS, AttributeLayout.CONTEXT_CLASS,
                "*", 22),
            new AttributeLayout(AttributeLayout.ATTRIBUTE_RUNTIME_INVISIBLE_ANNOTATIONS, AttributeLayout.CONTEXT_FIELD,
                "*", 22),
            new AttributeLayout(AttributeLayout.ATTRIBUTE_RUNTIME_INVISIBLE_ANNOTATIONS, AttributeLayout.CONTEXT_METHOD,
                "*", 22),
            new AttributeLayout(AttributeLayout.ATTRIBUTE_INNER_CLASSES, AttributeLayout.CONTEXT_CLASS, "", 23),
            new AttributeLayout(AttributeLayout.ATTRIBUTE_RUNTIME_VISIBLE_PARAMETER_ANNOTATIONS,
                AttributeLayout.CONTEXT_METHOD, "*", 23),
            new AttributeLayout(AttributeLayout.ATTRIBUTE_CLASS_FILE_VERSION, AttributeLayout.CONTEXT_CLASS, "", 24),
            new AttributeLayout(AttributeLayout.ATTRIBUTE_RUNTIME_INVISIBLE_PARAMETER_ANNOTATIONS,
                AttributeLayout.CONTEXT_METHOD, "*", 24),
            new AttributeLayout(AttributeLayout.ATTRIBUTE_ANNOTATION_DEFAULT, AttributeLayout.CONTEXT_METHOD, "*", 25)};
    }

    private final Map classLayouts = new HashMap();
    private final Map fieldLayouts = new HashMap();
    private final Map methodLayouts = new HashMap();
    private final Map codeLayouts = new HashMap();

    // The order of the maps in this array should not be changed as their
    // indices correspond to
    // the value of their context constants (AttributeLayout.CONTEXT_CLASS etc.)
    private final Map[] layouts = {classLayouts, fieldLayouts, methodLayouts, codeLayouts};

    private final Map layoutsToBands = new HashMap();

    public AttributeLayoutMap() throws Pack200Exception {
        final AttributeLayout[] defaultAttributeLayouts = getDefaultAttributeLayouts();
        for (int i = 0; i < defaultAttributeLayouts.length; i++) {
            add(defaultAttributeLayouts[i]);
        }
    }

    public void add(final AttributeLayout layout) {
        layouts[layout.getContext()].put(Integer.valueOf(layout.getIndex()), layout);
    }

    public void add(final AttributeLayout layout, final NewAttributeBands newBands) {
        add(layout);
        layoutsToBands.put(layout, newBands);
    }

    public AttributeLayout getAttributeLayout(final String name, final int context) throws Pack200Exception {
        final Map map = layouts[context];
        for (final Iterator iter = map.values().iterator(); iter.hasNext();) {
            final AttributeLayout layout = (AttributeLayout) iter.next();
            if (layout.getName().equals(name)) {
                return layout;
            }
        }
        return null;
    }

    public AttributeLayout getAttributeLayout(final int index, final int context) throws Pack200Exception {
        final Map map = layouts[context];
        return (AttributeLayout) map.get(Integer.valueOf(index));
    }

    /**
     * The map should not contain the same layout and name combination more than once for each context.
     *
     * @throws Pack200Exception Thrown when the name layout/name combination exists twice for a context.
     */
    public void checkMap() throws Pack200Exception {
        for (int i = 0; i < layouts.length; i++) {
            final Map map = layouts[i];
            Collection c = map.values();
            if (!(c instanceof List)) {
                c = new ArrayList(c);
            }
            final List l = (List) c;
            for (int j = 0; j < l.size(); j++) {
                final AttributeLayout layout1 = (AttributeLayout) l.get(j);
                for (int j2 = j + 1; j2 < l.size(); j2++) {
                    final AttributeLayout layout2 = (AttributeLayout) l.get(j2);
                    if (layout1.getName().equals(layout2.getName())
                        && layout1.getLayout().equals(layout2.getLayout())) {
                        throw new Pack200Exception(
                            "Same layout/name combination: " + layout1.getLayout() + "/" + layout1.getName()
                                + " exists twice for context: " + AttributeLayout.contextNames[layout1.getContext()]);
                    }
                }
            }
        }
    }

    public NewAttributeBands getAttributeBands(final AttributeLayout layout) {
        return (NewAttributeBands) layoutsToBands.get(layout);
    }

}