/*
* Copyright (c) 2007-2008, Dennis M. Sosnoski. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are permitted provided that the
* following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this list of conditions and the following
* disclaimer. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the
* following disclaimer in the documentation and/or other materials provided with the distribution. Neither the name of
* JiBX nor the names of its contributors may be used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.jibx.schema.codegen;
import java.util.List;
import org.eclipse.jdt.core.dom.ASTNode;
import org.eclipse.jdt.core.dom.Block;
import org.eclipse.jdt.core.dom.Expression;
import org.eclipse.jdt.core.dom.Statement;
import org.eclipse.jdt.core.dom.SwitchCase;
import org.eclipse.jdt.core.dom.SwitchStatement;
/**
* Switch statement builder. This wraps the AST switch representation with convenience methods and added control
* information.
*
* @author Dennis M. Sosnoski
*/
public class SwitchBuilder extends StatementBuilderBase
{
/** Method invocation. */
private final SwitchStatement m_switch;
/**
* Constructor.
*
* @param source
* @param expr expression
*/
public SwitchBuilder(ClassBuilder source, Expression expr) {
super(source);
m_switch = source.getAST().newSwitchStatement();
m_switch.setExpression(expr);
}
/**
* Get the statement.
*
* @return statement
*/
Statement getStatement() {
return m_switch;
}
/**
* Check if a break statement is needed following the statement for a particular case.
*
* @param stmt
* @return <code>true</code> if break needed, <code>false</code> if not
*/
private static boolean isBreakNeeded(Statement stmt) {
switch (stmt.getNodeType()) {
case ASTNode.BLOCK:
{
List stmts = ((Block)stmt).statements();
int size = stmts.size();
if (size == 0) {
return true;
} else {
return isBreakNeeded((Statement)stmts.get(size-1));
}
}
case ASTNode.RETURN_STATEMENT:
case ASTNode.THROW_STATEMENT:
return false;
default:
return true;
}
}
/**
* Add case to switch statement with a named constant as the match value.
*
* @param name named constant
* @param stmt statement to be executed
*/
public void addNamedCase(String name, StatementBuilderBase stmt) {
SwitchCase swcase = m_ast.newSwitchCase();
swcase.setExpression(m_ast.newSimpleName(name));
m_switch.statements().add(swcase);
m_switch.statements().add(stmt.getStatement());
if (isBreakNeeded(stmt.getStatement())) {
m_switch.statements().add(m_ast.newBreakStatement());
}
}
/**
* Add case to switch statement with a number as the match value.
*
* @param value match value
* @param stmt statement to be executed
*/
public void addNumberCase(String value, StatementBuilderBase stmt) {
SwitchCase swcase = m_ast.newSwitchCase();
swcase.setExpression(numberLiteral(value));
m_switch.statements().add(swcase);
m_switch.statements().add(stmt.getStatement());
if (isBreakNeeded(stmt.getStatement())) {
m_switch.statements().add(m_ast.newBreakStatement());
}
}
/**
* Add default case to switch statement.
*
* @param stmt statement to be executed
*/
public void addDefault(StatementBuilderBase stmt) {
SwitchCase swcase = m_ast.newSwitchCase();
m_switch.statements().add(swcase);
m_switch.statements().add(stmt.getStatement());
if (isBreakNeeded(stmt.getStatement())) {
m_switch.statements().add(m_ast.newBreakStatement());
}
}
/**
* Add case to switch statement with new block for case code.
*
* @param expr
* @return block
*/
private BlockBuilder newCaseBlock(Expression expr) {
SwitchCase swcase = m_ast.newSwitchCase();
swcase.setExpression(expr);
m_switch.statements().add(swcase);
BlockBuilder block = m_source.newBlock();
m_switch.statements().add(block.getStatement());
return block;
}
/**
* Add case to switch statement with returned block for code.
*
* @param name named constant
* @return block
*/
public BlockBuilder newNamedCase(String name) {
return newCaseBlock(m_ast.newSimpleName(name));
}
/**
* Add case to switch statement with returned block for code.
*
* @param value match value
* @return block
*/
public BlockBuilder newNumberCase(String value) {
return newCaseBlock(numberLiteral(value));
}
}