org.formulacompiler.compiler.internal.bytecode.ArrayAccessorForFullDataCompiler.java Source code

Introduction

Here is the source code for org.formulacompiler.compiler.internal.bytecode.ArrayAccessorForFullDataCompiler.java

Source

/*
 * Copyright (c) 2006-2009 by Abacus Research AG, Switzerland.
 * All rights reserved.
 *
 * This file is part of the Abacus Formula Compiler (AFC).
 *
 * For commercial licensing, please contact sales(at)formulacompiler.com.
 *
 * AFC is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * AFC 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with AFC.  If not, see <http://www.gnu.org/licenses/>.
 */

package org.formulacompiler.compiler.internal.bytecode;

import org.formulacompiler.compiler.CompilerException;
import org.formulacompiler.compiler.internal.expressions.DataType;
import org.formulacompiler.compiler.internal.expressions.ExpressionNode;
import org.formulacompiler.compiler.internal.expressions.ExpressionNodeForArrayReference;
import org.formulacompiler.compiler.internal.expressions.ExpressionNodeForConstantValue;
import org.objectweb.asm.FieldVisitor;
import org.objectweb.asm.Label;
import org.objectweb.asm.Opcodes;
import org.objectweb.asm.Type;
import org.objectweb.asm.commons.GeneratorAdapter;

public class ArrayAccessorForFullDataCompiler extends ArrayAccessorCompiler {

    public ArrayAccessorForFullDataCompiler(SectionCompiler _section, String _name,
            ExpressionNodeForArrayReference _node) {
        super(_section, "$arr$" + _name, _node);
    }

    @Override
    protected void compileBody() throws CompilerException {
        final GeneratorAdapter mv = mv();
        final DataType eltDataType = this.arrayNode.getDataType();
        final ExpressionCompiler eltCompiler = expressionCompiler(eltDataType);
        final Type eltType = eltCompiler.type();
        final String initName = methodName() + "$init";
        final String initDesc = "Z";

        // private boolean xy$init;
        final FieldVisitor fv = cw().visitField(Opcodes.ACC_PRIVATE, initName, initDesc, null, null);
        fv.visitEnd();

        // if (!this.xy$init) {
        final Label skipInit = mv.newLabel();
        mv.loadThis();
        mv.visitFieldInsn(Opcodes.GETFIELD, section().classInternalName(), initName, initDesc);
        mv.visitJumpInsn(Opcodes.IFNE, skipInit);

        // this.xy$init = true;
        mv.loadThis();
        mv.push(true);
        mv.visitFieldInsn(Opcodes.PUTFIELD, section().classInternalName(), initName, initDesc);

        // this.xy = { ?, c1, c2, ... }
        mv.loadThis();
        section().getArrayAccessorForConstDataOnly(this.arrayNode).compileCall(mv);
        int i = 0;
        for (ExpressionNode elt : this.arrayNode.arguments()) {
            if (!(elt instanceof ExpressionNodeForConstantValue)) {
                mv.visitInsn(Opcodes.DUP);
                mv.visitIntInsn(Opcodes.BIPUSH, i);
                eltCompiler.compile(elt);
                mv.arrayStore(eltType);
            }
            i++;
        }
        // return this.xy;
        mv.visitInsn(Opcodes.ARETURN);

        // } else
        // return this.xy;
        mv.mark(skipInit);
        mv.loadThis();
        section().getArrayAccessorForConstDataOnly(this.arrayNode).compileCall(mv);
        mv.visitInsn(Opcodes.ARETURN);

        if (section().hasReset()) {
            final GeneratorAdapter reset = section().resetter();
            // this.xy$init = false;
            reset.loadThis();
            reset.push(false);
            reset.visitFieldInsn(Opcodes.PUTFIELD, section().classInternalName(), initName, initDesc);
        }

    }

}