nodetypemanagerimpl.java

来自「jsr170接口的java实现。是个apache的开源项目。」· Java 代码 · 共 500 行 · 第 1/2 页

/*
 * 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.jackrabbit.core.nodetype;

import org.apache.commons.collections.map.ReferenceMap;
import org.apache.jackrabbit.name.NameException;
import org.apache.jackrabbit.name.NamespaceResolver;
import org.apache.jackrabbit.name.QName;
import org.apache.jackrabbit.name.NameFormat;
import org.apache.jackrabbit.util.IteratorHelper;
import org.apache.jackrabbit.util.name.NamespaceMapping;
import org.apache.jackrabbit.api.JackrabbitNodeTypeManager;
import org.apache.jackrabbit.core.NamespaceRegistryImpl;
import org.apache.jackrabbit.core.nodetype.compact.CompactNodeTypeDefReader;
import org.apache.jackrabbit.core.nodetype.compact.ParseException;
import org.apache.jackrabbit.core.nodetype.xml.NodeTypeReader;
import org.apache.jackrabbit.core.util.Dumpable;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;

import javax.jcr.RepositoryException;
import javax.jcr.UnsupportedRepositoryOperationException;
import javax.jcr.nodetype.NoSuchNodeTypeException;
import javax.jcr.nodetype.NodeType;
import javax.jcr.nodetype.NodeTypeIterator;

import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.PrintStream;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import java.util.Set;

/**
 * A <code>NodeTypeManagerImpl</code> implements a session dependant
 * NodeTypeManager.
 */
public class NodeTypeManagerImpl implements JackrabbitNodeTypeManager,
        Dumpable, NodeTypeRegistryListener {

    /**
     * The wrapped node type registry.
     */
    private final NodeTypeRegistry ntReg;

    /**
     * The persistent namespace registry where any new namespaces are
     * automatically registered when new node type definition files are
     * read.
     */
    private final NamespaceRegistryImpl nsReg;

    /**
     * The root node definition.
     */
    private final NodeDefinitionImpl rootNodeDef;

    /**
     * The namespace resolver used to translate qualified names to JCR names.
     */
    private final NamespaceResolver nsResolver;

    /**
     * A cache for <code>NodeType</code> instances created by this
     * <code>NodeTypeManager</code>
     */
    private final Map ntCache;

    /**
     * A cache for <code>PropertyDefinition</code> instances created by this
     * <code>NodeTypeManager</code>
     */
    private final Map pdCache;

    /**
     * A cache for <code>NodeDefinition</code> instances created by this
     * <code>NodeTypeManager</code>
     */
    private final Map ndCache;

    /**
     * Creates a new <code>NodeTypeManagerImpl</code> instance.
     *
     * @param ntReg      node type registry
     * @param nsReg      namespace registry
     * @param nsResolver namespace resolver
     */
    public NodeTypeManagerImpl(
            NodeTypeRegistry ntReg, NamespaceRegistryImpl nsReg,
            NamespaceResolver nsResolver) {
        this.nsResolver = nsResolver;
        this.ntReg = ntReg;
        this.nsReg = nsReg;
        this.ntReg.addListener(this);

        // setup caches with soft references to node type
        // & item definition instances
        ntCache = new ReferenceMap(ReferenceMap.HARD, ReferenceMap.SOFT);
        pdCache = new ReferenceMap(ReferenceMap.HARD, ReferenceMap.SOFT);
        ndCache = new ReferenceMap(ReferenceMap.HARD, ReferenceMap.SOFT);

        rootNodeDef = new NodeDefinitionImpl(ntReg.getRootNodeDef(), this,
                nsResolver);
        ndCache.put(rootNodeDef.unwrap().getId(), rootNodeDef);
    }

    /**
     * @return the root node definition
     */
    public NodeDefinitionImpl getRootNodeDefinition() {
        return rootNodeDef;
    }

    /**
     * @param id
     * @return the node definition
     */
    public NodeDefinitionImpl getNodeDefinition(NodeDefId id) {
        synchronized (ndCache) {
            NodeDefinitionImpl ndi = (NodeDefinitionImpl) ndCache.get(id);
            if (ndi == null) {
                NodeDef nd = ntReg.getNodeDef(id);
                if (nd != null) {
                    ndi = new NodeDefinitionImpl(nd, this, nsResolver);
                    ndCache.put(id, ndi);
                }
            }
            return ndi;
        }
    }

    /**
     * @param id
     * @return the property definition
     */
    public PropertyDefinitionImpl getPropertyDefinition(PropDefId id) {
        synchronized (pdCache) {
            PropertyDefinitionImpl pdi = (PropertyDefinitionImpl) pdCache.get(id);
            if (pdi == null) {
                PropDef pd = ntReg.getPropDef(id);
                if (pd != null) {
                    pdi = new PropertyDefinitionImpl(pd, this, nsResolver);
                    pdCache.put(id, pdi);
                }
            }
            return pdi;
        }
    }

    /**
     * @param name
     * @return
     * @throws NoSuchNodeTypeException
     */
    public NodeTypeImpl getNodeType(QName name) throws NoSuchNodeTypeException {
        synchronized (ntCache) {
            NodeTypeImpl nt = (NodeTypeImpl) ntCache.get(name);
            if (nt == null) {
                EffectiveNodeType ent = ntReg.getEffectiveNodeType(name);
                NodeTypeDef def = ntReg.getNodeTypeDef(name);
                nt = new NodeTypeImpl(ent, def, this, nsResolver);
                ntCache.put(name, nt);
            }
            return nt;
        }
    }

    /**
     * @return the node type registry
     */
    public NodeTypeRegistry getNodeTypeRegistry() {
        return ntReg;
    }

    /**
     * Registers the node types defined in the given input stream depending
     * on the content type specified for the stream. This will also register
     * any namespaces identified in the input stream if they have not already
     * been registered.
     *
     * @param in node type XML stream
     * @param contentType type of the input stream
     * @param reregisterExisting flag indicating whether node types should be
     *                           reregistered if they already exist
     * @return registered node types
     * @throws IOException if the input stream could not be read or parsed
     * @throws RepositoryException if the node types are invalid or another
     *                             repository error occurs
     */
    public NodeType[] registerNodeTypes(InputStream in, String contentType,
            boolean reregisterExisting)
            throws IOException, RepositoryException {

        try {
            Map namespaceMap = new HashMap();
            List nodeTypeDefs = new ArrayList();

            if (contentType.equalsIgnoreCase(TEXT_XML)
                    || contentType.equalsIgnoreCase(APPLICATION_XML)) {
                try {
                    NodeTypeReader ntr = new NodeTypeReader(in);

                    Properties namespaces = ntr.getNamespaces();
                    if (namespaces != null) {
                        Enumeration prefixes = namespaces.propertyNames();
                        while (prefixes.hasMoreElements()) {
                            String prefix = (String) prefixes.nextElement();
                            String uri = namespaces.getProperty(prefix);
                            namespaceMap.put(prefix, uri);
                        }
                    }

                    NodeTypeDef[] defs = ntr.getNodeTypeDefs();
                    nodeTypeDefs.addAll(Arrays.asList(defs));
                } catch (NameException e) {
                    throw new RepositoryException("Illegal JCR name", e);
                }
            } else if (contentType.equalsIgnoreCase(TEXT_X_JCR_CND)) {
                try {
                    NamespaceMapping mapping = new NamespaceMapping(nsResolver);
                    CompactNodeTypeDefReader reader = new CompactNodeTypeDefReader(
                            new InputStreamReader(in), "cnd input stream", mapping);

                    namespaceMap.putAll(mapping.getPrefixToURIMapping());

                    nodeTypeDefs.addAll(reader.getNodeTypeDefs());
                } catch (ParseException e) {