lucee.transformer.bytecode.cast.CastInt.java Source code

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Here is the source code for lucee.transformer.bytecode.cast.CastInt.java

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/**
 *
 * Copyright (c) 2014, the Railo Company Ltd. All rights reserved.
 *
 * 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, see <http://www.gnu.org/licenses/>.
 * 
 **/
package lucee.transformer.bytecode.cast;

import lucee.runtime.exp.TemplateException;
import lucee.transformer.bytecode.BytecodeContext;
import lucee.transformer.bytecode.BytecodeException;
import lucee.transformer.bytecode.Literal;
import lucee.transformer.bytecode.expression.ExprInt;
import lucee.transformer.bytecode.expression.ExprString;
import lucee.transformer.bytecode.expression.Expression;
import lucee.transformer.bytecode.expression.ExpressionBase;
import lucee.transformer.bytecode.literal.LitInteger;
import lucee.transformer.bytecode.util.Methods;
import lucee.transformer.bytecode.util.Types;

import org.objectweb.asm.Type;
import org.objectweb.asm.commons.GeneratorAdapter;
import org.objectweb.asm.commons.Method;

/**
 * cast a Expression to a Double
 */
public final class CastInt extends ExpressionBase implements ExprInt, Cast {

    private Expression expr;

    private CastInt(Expression expr) {
        super(expr.getStart(), expr.getEnd());
        this.expr = expr;
    }

    /**
     * Create a String expression from a Expression
     * @param expr
     * @return String expression
     * @throws TemplateException 
     */
    public static ExprInt toExprInt(Expression expr) {
        if (expr instanceof ExprInt)
            return (ExprInt) expr;
        if (expr instanceof Literal) {
            Double dbl = ((Literal) expr).getDouble(null);
            if (dbl != null)
                return new LitInteger((int) dbl.doubleValue(), expr.getStart(), expr.getEnd());
        }
        return new CastInt(expr);
    }

    /**
     * @see lucee.transformer.bytecode.expression.Expression#_writeOut(org.objectweb.asm.commons.GeneratorAdapter, int)
     */
    public Type _writeOut(BytecodeContext bc, int mode) throws BytecodeException {
        GeneratorAdapter adapter = bc.getAdapter();

        if (expr instanceof ExprString) {
            expr.writeOut(bc, MODE_REF);
            if (mode == MODE_VALUE)
                adapter.invokeStatic(Types.CASTER, Methods.METHOD_TO_INT_VALUE_FROM_STRING);
            else
                adapter.invokeStatic(Types.CASTER, Methods.METHOD_TO_INTEGER_FROM_STRING);
        } else {
            Type rtn = expr.writeOut(bc, mode);
            if (mode == MODE_VALUE) {
                if (!Types.isPrimitiveType(rtn)) {
                    adapter.invokeStatic(Types.CASTER, Methods.METHOD_TO_INT_VALUE);
                } else if (Types.BOOLEAN_VALUE.equals(rtn)) {
                    adapter.invokeStatic(Types.CASTER, Methods.METHOD_TO_INT_VALUE_FROM_BOOLEAN);
                } else if (Types.SHORT_VALUE.equals(rtn)) {
                    // No Cast needed
                } else if (Types.FLOAT_VALUE.equals(rtn)) {
                    adapter.cast(Types.FLOAT_VALUE, Types.INT_VALUE);
                } else if (Types.LONG_VALUE.equals(rtn)) {
                    adapter.cast(Types.LONG_VALUE, Types.INT_VALUE);
                } else if (Types.DOUBLE_VALUE.equals(rtn)) {
                    adapter.cast(Types.DOUBLE_VALUE, Types.INT_VALUE);
                } else if (Types.INT_VALUE.equals(rtn)) {
                    // No Cast needed
                } else {
                    adapter.invokeStatic(Types.CASTER,
                            new Method("toRef", Types.toRefType(rtn), new Type[] { rtn }));
                    adapter.invokeStatic(Types.CASTER, Methods.METHOD_TO_INT_VALUE);
                }
                return Types.INT_VALUE;

            } else if (Types.isPrimitiveType(rtn)) {
                if (Types.DOUBLE_VALUE.equals(rtn)) {
                    adapter.invokeStatic(Types.CASTER, Methods.METHOD_TO_INTEGER_FROM_DOUBLE);
                } else if (Types.BOOLEAN_VALUE.equals(rtn)) {
                    adapter.invokeStatic(Types.CASTER, Methods.METHOD_TO_INTEGER_FROM_BOOLEAN);
                } else {
                    adapter.invokeStatic(Types.CASTER,
                            new Method("toRef", Types.toRefType(rtn), new Type[] { rtn }));
                    adapter.invokeStatic(Types.CASTER, Methods.METHOD_TO_INTEGER);
                }
                return Types.INTEGER;
            }

            if (!Types.INTEGER.equals(rtn))
                adapter.invokeStatic(Types.CASTER, Methods.METHOD_TO_INTEGER);
            return Types.INTEGER;
        }

        if (mode == MODE_VALUE)
            return Types.INT_VALUE;
        return Types.INTEGER;
    }

    @Override
    public Expression getExpr() {
        return expr;
    }
}