/*******************************************************************************
* Copyright (c) 1998, 2011 Oracle. All rights reserved.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0
* which accompanies this distribution.
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
* and the Eclipse Distribution License is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* Contributors:
* Oracle - initial API and implementation from Oracle TopLink
* 05/16/2008-1.0M8 Guy Pelletier
* - 218084: Implement metadata merging functionality between mapping files
* 03/24/2011-2.3 Guy Pelletier
* - 337323: Multi-tenant with shared schema support (part 1)
******************************************************************************/
package org.eclipse.persistence.internal.jpa.metadata.queries;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.eclipse.persistence.exceptions.ValidationException;
import org.eclipse.persistence.internal.jpa.JPAQuery;
import org.eclipse.persistence.internal.jpa.QueryHintsHandler;
import org.eclipse.persistence.internal.jpa.metadata.MetadataProject;
import org.eclipse.persistence.internal.jpa.metadata.ORMetadata;
import org.eclipse.persistence.internal.jpa.metadata.accessors.MetadataAccessor;
import org.eclipse.persistence.internal.jpa.metadata.accessors.objects.MetadataAnnotation;
import org.eclipse.persistence.internal.sessions.AbstractSession;
/**
* INTERNAL:
* Object to hold onto a named query metadata.
*
* Key notes:
* - any metadata mapped from XML to this class must be compared in the
* equals method.
* - when loading from annotations, the constructor accepts the metadata
* accessor this metadata was loaded from. Used it to look up any
* 'companion' annotation needed for processing.
* - methods should be preserved in alphabetical order.
*
* @author Guy Pelletier
* @since TopLink EJB 3.0 Reference Implementation
*/
public class NamedQueryMetadata extends ORMetadata {
private String m_lockMode;
private List<QueryHintMetadata> m_hints = new ArrayList<QueryHintMetadata>();
private String m_name;
private String m_query;
/**
* INTERNAL:
* Used for XML loading.
*/
public NamedQueryMetadata() {
super("<named-query>");
}
/**
* INTERNAL:
* Used for annotation loading.
*/
public NamedQueryMetadata(MetadataAnnotation namedQuery, MetadataAccessor accessor) {
super(namedQuery, accessor);
m_name = (String) namedQuery.getAttribute("name");
m_query = (String) namedQuery.getAttribute("query");
m_lockMode = (String) namedQuery.getAttribute("lockMode");
for (Object hint : (Object[]) namedQuery.getAttributeArray("hints")) {
m_hints.add(new QueryHintMetadata((MetadataAnnotation)hint, accessor));
}
}
/**
* INTERNAL:
* Used for XML loading.
*/
protected NamedQueryMetadata(String xmlElement) {
super(xmlElement);
}
/**
* INTERNAL:
*/
@Override
public boolean equals(Object objectToCompare) {
if (objectToCompare instanceof NamedQueryMetadata) {
NamedQueryMetadata query = (NamedQueryMetadata) objectToCompare;
if (! valuesMatch(m_name, query.getName())) {
return false;
}
if (! valuesMatch(m_query, query.getQuery())) {
return false;
}
return valuesMatch(m_hints, query.getHints());
}
return false;
}
/**
* INTERNAL:
* Used for OX mapping.
*/
public List<QueryHintMetadata> getHints() {
return m_hints;
}
/**
* INTERNAL:
* To satisfy the abstract getIdentifier() method from ORMetadata.
*/
@Override
public String getIdentifier() {
return m_name;
}
/**
* INTERNAL:
* Used for OX mapping.
*/
public String getLockMode() {
return m_lockMode;
}
/**
* INTERNAL:
* Used for OX mapping.
*/
public String getName() {
return m_name;
}
/**
* INTERNAL:
* Used for OX mapping.
*/
public String getQuery() {
return m_query;
}
/**
* INTERNAL:
*/
public void process(AbstractSession session, ClassLoader loader, MetadataProject project) {
try {
Map<String, Object> hints = processQueryHints(session);
session.addJPAQuery(new JPAQuery(getName(), getQuery(), getLockMode(), hints));
} catch (Exception exception) {
throw ValidationException.errorProcessingNamedQuery(getClass(), getName(), exception);
}
}
/**
* INTERNAL:
*/
protected Map<String, Object> processQueryHints(AbstractSession session) {
Map<String, Object> hints = new HashMap<String, Object>();
for (QueryHintMetadata hint : this.m_hints) {
QueryHintsHandler.verify(hint.getName(), hint.getValue(), this.m_name, session);
Object value = hints.get(hint.getName());
if (value != null) {
Object[] values = null;
if (value instanceof Object[]) {
List list = new ArrayList(Arrays.asList((Object[])value));
list.add(hint.getValue());
values = list.toArray();
} else {
values = new Object[2];
values[0] = value;
values[1] = hint.getValue();
}
hints.put(hint.getName(), values);
} else {
hints.put(hint.getName(), hint.getValue());
}
}
return hints;
}
/**
* INTERNAL:
* Used for OX mapping.
*/
public void setHints(List<QueryHintMetadata> hints) {
m_hints = hints;
}
/**
* INTERNAL:
* Used for OX mapping.
*/
public void setLockMode(String lockMode) {
m_lockMode = lockMode;
}
/**
* INTERNAL:
* Used for OX mapping.
*/
public void setName(String name) {
m_name = name;
}
/**
* INTERNAL:
* Used for OX mapping.
*/
public void setQuery(String query) {
m_query = query;
}
}