/*
* JBoss, Home of Professional Open Source.
* See the COPYRIGHT.txt file distributed with this work for information
* regarding copyright ownership. Some portions may be licensed
* to Red Hat, Inc. under one or more contributor license agreements.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301 USA.
*/
package org.teiid.query.sql.proc;
import java.util.Collections;
import java.util.List;
import org.teiid.core.util.EquivalenceUtil;
import org.teiid.core.util.HashCodeUtil;
import org.teiid.query.sql.LanguageObject;
import org.teiid.query.sql.LanguageVisitor;
import org.teiid.query.sql.lang.Command;
import org.teiid.query.sql.lang.Query;
import org.teiid.query.sql.symbol.ElementSymbol;
import org.teiid.query.sql.symbol.Expression;
import org.teiid.query.sql.symbol.GroupSymbol;
import org.teiid.query.sql.visitor.SQLStringVisitor;
/**
* <p> This class represents a update procedure in the storedprocedure language.
* It extends the <code>Command</code> and represents the command for Insert , Update
* and Delete procedures.</p>
*/
public class CreateProcedureCommand extends Command {
// top level block for the procedure
private Block block;
private List projectedSymbols;
private List<? extends Expression> resultSetColumns;
private GroupSymbol virtualGroup;
private int updateType = Command.TYPE_UNKNOWN;
private ElementSymbol returnVariable;
/**
* Constructor for CreateUpdateProcedureCommand.
*/
public CreateProcedureCommand() {
super();
}
/**
* Constructor for CreateUpdateProcedureCommand.
* @param block The block on this command
* @param type The procedure type
*/
public CreateProcedureCommand(Block block) {
this.block = block;
}
/**
* Return type of command to make it easier to build switch statements by command type.
* @return The type of this command
*/
public int getType() {
return Command.TYPE_UPDATE_PROCEDURE;
}
/**
* Get the block on this command.
* @return The <code>Block</code> on this command
*/
public Block getBlock() {
return block;
}
/**
* Set the block on this command.
* @param block The <code>Block</code> on this command
*/
public void setBlock(Block block) {
this.block = block;
}
// =========================================================================
// P R O C E S S I N G M E T H O D S
// =========================================================================
public void acceptVisitor(LanguageVisitor visitor) {
visitor.visit(this);
}
/**
* Deep clone statement to produce a new identical statement.
* @return Deep clone
*/
public Object clone() {
CreateProcedureCommand copy = new CreateProcedureCommand();
//Clone this class state
if (this.block != null) {
copy.setBlock(this.block.clone());
}
if (this.projectedSymbols != null) {
copy.projectedSymbols = LanguageObject.Util.deepClone(this.projectedSymbols, Expression.class);
}
if (this.resultSetColumns != null) {
copy.resultSetColumns = LanguageObject.Util.deepClone(this.resultSetColumns, Expression.class);
}
if (this.virtualGroup != null) {
copy.virtualGroup = this.virtualGroup.clone();
}
if (this.returnVariable != null) {
copy.returnVariable = this.returnVariable;
}
copy.updateType = this.updateType;
this.copyMetadataState(copy);
return copy;
}
/**
* Compare two CreateUpdateProcedureCommand for equality. They will only evaluate to equal if
* they are IDENTICAL: the commandTypes are same and the block objects are equal.
* @param obj Other object
* @return True if equal
*/
public boolean equals(Object obj) {
// Quick same object test
if(this == obj) {
return true;
}
// Quick fail tests
if(! (obj instanceof CreateProcedureCommand)) {
return false;
}
CreateProcedureCommand other = (CreateProcedureCommand)obj;
// Compare the block
return sameOptionAndHint(other) && EquivalenceUtil.areEqual(getBlock(), other.getBlock());
}
/**
* Get hashcode for CreateUpdateProcedureCommand. WARNING: This hash code relies
* on the hash codes of the block and the procedure type of this command. Hash code
* is only valid after the command has been completely constructed.
* @return Hash code
*/
public int hashCode() {
// This hash code relies on the block and the procedure type for this command
int myHash = 0;
myHash = HashCodeUtil.hashCode(myHash, this.getBlock());
return myHash;
}
/**
* Returns a string representation of an instance of this class.
* @return String representation of object
*/
public String toString() {
return SQLStringVisitor.getSQLString(this);
}
// ========================================
// Methods inherited from Command
// ========================================
/**
* Get the ordered list of all elements returned by this query. These elements
* may be ElementSymbols or ExpressionSymbols but in all cases each represents a
* single column.
* @return Ordered list of SingleElementSymbol
*/
public List getProjectedSymbols(){
if(this.projectedSymbols != null){
return this.projectedSymbols;
}
//user may have not entered any query yet
return Collections.EMPTY_LIST;
}
public List<? extends Expression> getResultSetColumns() {
return resultSetColumns;
}
public void setResultSetColumns(List<? extends Expression> resultSetColumns) {
this.resultSetColumns = resultSetColumns;
}
/**
* @param projSymbols
*/
public void setProjectedSymbols(List projSymbols) {
projectedSymbols = projSymbols;
}
/**
* @see org.teiid.query.sql.lang.Command#areResultsCachable()
*/
public boolean areResultsCachable() {
return Query.areColumnsCachable(getProjectedSymbols());
}
public GroupSymbol getVirtualGroup() {
return this.virtualGroup;
}
public void setVirtualGroup(GroupSymbol virtualGroup) {
this.virtualGroup = virtualGroup;
}
public void setUpdateType(int type) {
//we select the count as the last operation
this.resultSetColumns = Command.getUpdateCommandSymbol();
this.updateType = type;
}
public int getUpdateType() {
return updateType;
}
public void setReturnVariable(ElementSymbol symbol) {
this.returnVariable = symbol;
}
public ElementSymbol getReturnVariable() {
return returnVariable;
}
@Override
public boolean returnsResultSet() {
return this.resultSetColumns != null && !this.resultSetColumns.isEmpty();
}
} // END CLASS