/* | |
* Copyright 2004-2005 The Apache Software Foundation or its licensors, | |
* as applicable. | |
* | |
* 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.jackrabbit.session.nodetype; | |
import java.util.HashSet; | |
import java.util.Set; | |
import javax.jcr.nodetype.NodeTypeIterator; | |
import javax.jcr.nodetype.NodeTypeManager; | |
import org.apache.jackrabbit.base.nodetype.BaseNodeTypeManager; | |
import org.apache.jackrabbit.iterator.ArrayNodeTypeIterator; | |
import org.apache.jackrabbit.session.SessionHelper; | |
import org.apache.jackrabbit.state.nodetype.NodeTypeManagerState; | |
import org.apache.jackrabbit.state.nodetype.NodeTypeState; | |
/** | |
* Immutable and session-bound node type manager frontend. An instance | |
* of this class presents the underlying node type manager state using | |
* the JCR NodeTypeManager interface. | |
* <p> | |
* By not exposing the setter methods of the underlying state instance, | |
* this class intentionally makes it impossible for a JCR client to modify | |
* node type information. | |
*/ | |
public final class SessionNodeTypeManager extends BaseNodeTypeManager | |
implements NodeTypeManager { | |
/** Helper for accessing the current session. */ | |
private final SessionHelper helper; | |
/** The underlying node type manager state instance. */ | |
private final NodeTypeManagerState state; | |
/** | |
* Creates a node type manager frontend that is bound to the | |
* given session and underlying node type manager state. | |
* | |
* @param helper helper for accessing the current session | |
* @param state underlying node type manager state | |
*/ | |
public SessionNodeTypeManager( | |
SessionHelper helper, NodeTypeManagerState state) { | |
this.helper = helper; | |
this.state = state; | |
} | |
/** | |
* Returns all available node types. The returned node types are | |
* SessionNodeTypes instantiated using the node type states returned | |
* by the underlying node type manager state. | |
* | |
* @return all node types | |
* @see SessionNodeType | |
* @see NodeTypeManager#getAllNodeTypes() | |
* @see NodeTypeManagerState#getNodeTypeStates() | |
*/ | |
public NodeTypeIterator getAllNodeTypes() { | |
Set types = new HashSet(); | |
NodeTypeState[] states = state.getNodeTypeStates(); | |
for (int i = 0; i < states.length; i++) { | |
types.add(new SessionNodeType(helper, states[i])); | |
} | |
return new ArrayNodeTypeIterator(types); | |
} | |
/** | |
* Compares objects for equality. Returns <code>true</code> if the | |
* given object is a SessionNodeTypeManager with the same underlying node | |
* type manager state and session. | |
* <p> | |
* Note that the node type manager state class does not override the | |
* equals method and thus the mutable state instances are compared for | |
* reference equality. | |
* | |
* @param that the object to compare this object with | |
* @return <code>true</code> if the objects are equal, | |
* <code>false</code> otherwise | |
* @see Object#equals(Object) | |
*/ | |
public boolean equals(Object that) { | |
if (this == that) { | |
return true; | |
} else if (that instanceof SessionNodeTypeManager) { | |
return state.equals(((SessionNodeTypeManager) that).state) | |
&& helper.equals(((SessionNodeTypeManager) that).helper); | |
} else { | |
return false; | |
} | |
} | |
/** | |
* Returns a hash code for this object. To satisfy the equality | |
* constraints the returned hash code is a combination of the | |
* hash codes of the underlying node type manager state and session. | |
* | |
* @return hash code | |
* @see Object#hashCode() | |
*/ | |
public int hashCode() { | |
int code = 17; | |
code = code * 37 + state.hashCode(); | |
code = code * 37 + helper.hashCode(); | |
return code; | |
} | |
} |