| /* |
| * reserved comment block |
| * DO NOT REMOVE OR ALTER! |
| */ |
| /* |
| * Copyright 2002,2004 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 com.sun.org.apache.xerces.internal.impl.xs.util; |
| |
| import java.util.AbstractMap; |
| import java.util.AbstractSet; |
| import java.util.Iterator; |
| import java.util.Map; |
| import java.util.NoSuchElementException; |
| import java.util.Set; |
| |
| import javax.xml.XMLConstants; |
| import javax.xml.namespace.QName; |
| |
| import com.sun.org.apache.xerces.internal.util.SymbolHash; |
| import com.sun.org.apache.xerces.internal.xs.XSNamedMap; |
| import com.sun.org.apache.xerces.internal.xs.XSObject; |
| |
| /** |
| * Containts the map between qnames and XSObject's. |
| * |
| * @xerces.internal |
| * |
| * @author Sandy Gao, IBM |
| * |
| * @version $Id: XSNamedMapImpl.java,v 1.7 2010-11-01 04:40:06 joehw Exp $ |
| */ |
| public class XSNamedMapImpl extends AbstractMap implements XSNamedMap { |
| |
| /** |
| * An immutable empty map. |
| */ |
| public static final XSNamedMapImpl EMPTY_MAP = new XSNamedMapImpl(new XSObject[0], 0); |
| |
| // components of these namespaces are stored in this map |
| final String[] fNamespaces; |
| // number of namespaces |
| final int fNSNum; |
| // each entry contains components in one namespace |
| final SymbolHash[] fMaps; |
| // store all components from all namespace. |
| // used when this map is accessed as a list. |
| XSObject[] fArray = null; |
| // store the number of components. |
| // used when this map is accessed as a list. |
| int fLength = -1; |
| // Set of Map.Entry<QName,XSObject> for the java.util.Map methods |
| private Set fEntrySet = null; |
| |
| /** |
| * Construct an XSNamedMap implementation for one namespace |
| * |
| * @param namespace the namespace to which the components belong |
| * @param map the map from local names to components |
| */ |
| public XSNamedMapImpl(String namespace, SymbolHash map) { |
| fNamespaces = new String[] {namespace}; |
| fMaps = new SymbolHash[] {map}; |
| fNSNum = 1; |
| } |
| |
| /** |
| * Construct an XSNamedMap implementation for a list of namespaces |
| * |
| * @param namespaces the namespaces to which the components belong |
| * @param maps the maps from local names to components |
| * @param num the number of namespaces |
| */ |
| public XSNamedMapImpl(String[] namespaces, SymbolHash[] maps, int num) { |
| fNamespaces = namespaces; |
| fMaps = maps; |
| fNSNum = num; |
| } |
| |
| /** |
| * Construct an XSNamedMap implementation one namespace from an array |
| * |
| * @param array containing all components |
| * @param length number of components |
| */ |
| public XSNamedMapImpl(XSObject[] array, int length) { |
| if (length == 0) { |
| fNamespaces = null; |
| fMaps = null; |
| fNSNum = 0; |
| fArray = array; |
| fLength = 0; |
| return; |
| } |
| // because all components are from the same target namesapce, |
| // get the namespace from the first one. |
| fNamespaces = new String[]{array[0].getNamespace()}; |
| fMaps = null; |
| fNSNum = 1; |
| // copy elements to the Vector |
| fArray = array; |
| fLength = length; |
| } |
| |
| /** |
| * The number of <code>XSObjects</code> in the <code>XSObjectList</code>. |
| * The range of valid child object indices is 0 to <code>length-1</code> |
| * inclusive. |
| */ |
| public synchronized int getLength() { |
| if (fLength == -1) { |
| fLength = 0; |
| for (int i = 0; i < fNSNum; i++) { |
| fLength += fMaps[i].getLength(); |
| } |
| } |
| return fLength; |
| } |
| |
| /** |
| * Retrieves an <code>XSObject</code> specified by local name and |
| * namespace URI. |
| * <br>Per XML Namespaces, applications must use the value <code>null</code> as the |
| * <code>namespace</code> parameter for methods if they wish to specify |
| * no namespace. |
| * @param namespace The namespace URI of the <code>XSObject</code> to |
| * retrieve, or <code>null</code> if the <code>XSObject</code> has no |
| * namespace. |
| * @param localName The local name of the <code>XSObject</code> to |
| * retrieve. |
| * @return A <code>XSObject</code> (of any type) with the specified local |
| * name and namespace URI, or <code>null</code> if they do not |
| * identify any object in this map. |
| */ |
| public XSObject itemByName(String namespace, String localName) { |
| for (int i = 0; i < fNSNum; i++) { |
| if (isEqual(namespace, fNamespaces[i])) { |
| // when this map is created from SymbolHash's |
| // get the component from SymbolHash |
| if (fMaps != null) { |
| return (XSObject)fMaps[i].get(localName); |
| } |
| // Otherwise (it's created from an array) |
| // go through the array to find a matching name |
| XSObject ret; |
| for (int j = 0; j < fLength; j++) { |
| ret = fArray[j]; |
| if (ret.getName().equals(localName)) { |
| return ret; |
| } |
| } |
| return null; |
| } |
| } |
| return null; |
| } |
| |
| /** |
| * Returns the <code>index</code>th item in the collection or |
| * <code>null</code> if <code>index</code> is greater than or equal to |
| * the number of objects in the list. The index starts at 0. |
| * @param index index into the collection. |
| * @return The <code>XSObject</code> at the <code>index</code>th |
| * position in the <code>XSObjectList</code>, or <code>null</code> if |
| * the index specified is not valid. |
| */ |
| public synchronized XSObject item(int index) { |
| if (fArray == null) { |
| // calculate the total number of elements |
| getLength(); |
| fArray = new XSObject[fLength]; |
| int pos = 0; |
| // get components from all SymbolHashes |
| for (int i = 0; i < fNSNum; i++) { |
| pos += fMaps[i].getValues(fArray, pos); |
| } |
| } |
| if (index < 0 || index >= fLength) { |
| return null; |
| } |
| return fArray[index]; |
| } |
| |
| static boolean isEqual(String one, String two) { |
| return (one != null) ? one.equals(two) : (two == null); |
| } |
| |
| /* |
| * java.util.Map methods |
| */ |
| |
| public boolean containsKey(Object key) { |
| return (get(key) != null); |
| } |
| |
| public Object get(Object key) { |
| if (key instanceof QName) { |
| final QName name = (QName) key; |
| String namespaceURI = name.getNamespaceURI(); |
| if (XMLConstants.NULL_NS_URI.equals(namespaceURI)) { |
| namespaceURI = null; |
| } |
| String localPart = name.getLocalPart(); |
| return itemByName(namespaceURI, localPart); |
| } |
| return null; |
| } |
| |
| public int size() { |
| return getLength(); |
| } |
| |
| public synchronized Set entrySet() { |
| // Defer creation of the entry set until it is actually needed. |
| if (fEntrySet == null) { |
| final int length = getLength(); |
| final XSNamedMapEntry[] entries = new XSNamedMapEntry[length]; |
| for (int i = 0; i < length; ++i) { |
| XSObject xso = item(i); |
| entries[i] = new XSNamedMapEntry(new QName(xso.getNamespace(), xso.getName()), xso); |
| } |
| // Create a view of this immutable map. |
| fEntrySet = new AbstractSet() { |
| public Iterator iterator() { |
| return new Iterator() { |
| private int index = 0; |
| public boolean hasNext() { |
| return (index < length); |
| } |
| public Object next() { |
| if (index < length) { |
| return entries[index++]; |
| } |
| throw new NoSuchElementException(); |
| } |
| public void remove() { |
| throw new UnsupportedOperationException(); |
| } |
| }; |
| } |
| public int size() { |
| return length; |
| } |
| }; |
| } |
| return fEntrySet; |
| } |
| |
| /** An entry in the XSNamedMap. **/ |
| private static final class XSNamedMapEntry implements Map.Entry { |
| private final QName key; |
| private final XSObject value; |
| public XSNamedMapEntry(QName key, XSObject value) { |
| this.key = key; |
| this.value = value; |
| } |
| public Object getKey() { |
| return key; |
| } |
| public Object getValue() { |
| return value; |
| } |
| public Object setValue(Object value) { |
| throw new UnsupportedOperationException(); |
| } |
| public boolean equals(Object o) { |
| if (o instanceof Map.Entry) { |
| Map.Entry e = (Map.Entry) o; |
| Object otherKey = e.getKey(); |
| Object otherValue = e.getValue(); |
| return (key == null ? otherKey == null : key.equals(otherKey)) && |
| (value == null ? otherValue == null : value.equals(otherValue)); |
| } |
| return false; |
| } |
| public int hashCode() { |
| return (key == null ? 0 : key.hashCode()) |
| ^ (value == null ? 0 : value.hashCode()); |
| } |
| public String toString() { |
| StringBuffer buffer = new StringBuffer(); |
| buffer.append(String.valueOf(key)); |
| buffer.append('='); |
| buffer.append(String.valueOf(value)); |
| return buffer.toString(); |
| } |
| } |
| |
| } // class XSNamedMapImpl |