org.modeshape.jcr.query.model.Column Maven / Gradle / Ivy
/*
* ModeShape (http://www.modeshape.org)
*
* 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.modeshape.jcr.query.model;
import org.modeshape.common.annotation.Immutable;
import org.modeshape.common.util.CheckArg;
import org.modeshape.common.util.ObjectUtil;
/**
*
*/
@Immutable
public class Column implements LanguageObject, javax.jcr.query.qom.Column {
private static final long serialVersionUID = 1L;
private final SelectorName selectorName;
private final String propertyName;
private final String columnName;
/**
* Include a column for each of the single-valued, accessible properties on the node identified by the selector.
*
* @param selectorName the selector name
*/
public Column( SelectorName selectorName ) {
CheckArg.isNotNull(selectorName, "selectorName");
this.selectorName = selectorName;
this.propertyName = null;
this.columnName = null;
}
/**
* A column with the given name representing the named property on the node identified by the selector.
*
* @param selectorName the selector name
* @param propertyName the name of the property
* @param columnName the name of the column
*/
public Column( SelectorName selectorName,
String propertyName,
String columnName ) {
CheckArg.isNotNull(selectorName, "selectorName");
CheckArg.isNotNull(propertyName, "propertyName");
CheckArg.isNotNull(columnName, "columnName");
this.selectorName = selectorName;
this.propertyName = propertyName;
this.columnName = columnName;
}
/**
* Get the name of the selector for the node.
*
* @return the selector name; never null
*/
public final SelectorName selectorName() {
return selectorName;
}
@Override
public String getSelectorName() {
return selectorName.getString();
}
@Override
public final String getPropertyName() {
return propertyName;
}
@Override
public final String getColumnName() {
return columnName;
}
@Override
public String toString() {
return Visitors.readable(this);
}
@Override
public int hashCode() {
return selectorName().hashCode();
}
@Override
public boolean equals( Object obj ) {
if (obj == this) return true;
if (obj instanceof Column) {
Column that = (Column)obj;
if (!this.selectorName.equals(that.selectorName)) return false;
if (!ObjectUtil.isEqualWithNulls(this.propertyName, that.propertyName)) return false;
if (!ObjectUtil.isEqualWithNulls(this.columnName, that.columnName)) return false;
return true;
}
return false;
}
/**
* Create a copy of this Column except that uses the supplied selector name instead.
*
* @param newSelectorName the new selector name
* @return a new Column with the supplied selector name and the property and column names from this object; never null
* @throws IllegalArgumentException if the supplied selector name is null
*/
public Column with( SelectorName newSelectorName ) {
return new Column(newSelectorName, propertyName, columnName);
}
public Column withColumnName( String columnName ) {
return new Column(selectorName, propertyName, columnName);
}
@Override
public void accept( Visitor visitor ) {
visitor.visit(this);
}
}
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