/***
 * ASM: a very small and fast Java bytecode manipulation framework
 * Copyright (c) 2000-2007 INRIA, France Telecom
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. 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.
 * 3. Neither the name of the copyright holders 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 alterrs.asm.optimizer;

import alterrs.asm.AnnotationVisitor;
import alterrs.asm.Label;
import alterrs.asm.MethodAdapter;
import alterrs.asm.MethodVisitor;
import alterrs.asm.Opcodes;

/**
 * An {@link alterrs.asm.MethodVisitor} that collects the {@link Constant}s of
 * the methods it visits.
 * 
 * @author Eric Bruneton
 */
public class MethodConstantsCollector extends MethodAdapter {

	private final ConstantPool cp;

	public MethodConstantsCollector(final MethodVisitor mv,
			final ConstantPool cp) {
		super(mv);
		this.cp = cp;
	}

	public AnnotationVisitor visitAnnotationDefault() {
		cp.newUTF8("AnnotationDefault");
		return new AnnotationConstantsCollector(mv.visitAnnotationDefault(), cp);
	}

	public AnnotationVisitor visitAnnotation(final String desc,
			final boolean visible) {
		cp.newUTF8(desc);
		if (visible) {
			cp.newUTF8("RuntimeVisibleAnnotations");
		} else {
			cp.newUTF8("RuntimeInvisibleAnnotations");
		}
		return new AnnotationConstantsCollector(mv.visitAnnotation(desc,
				visible), cp);
	}

	public AnnotationVisitor visitParameterAnnotation(final int parameter,
			final String desc, final boolean visible) {
		cp.newUTF8(desc);
		if (visible) {
			cp.newUTF8("RuntimeVisibleParameterAnnotations");
		} else {
			cp.newUTF8("RuntimeInvisibleParameterAnnotations");
		}
		return new AnnotationConstantsCollector(mv.visitParameterAnnotation(
				parameter, desc, visible), cp);
	}

	public void visitTypeInsn(final int opcode, final String type) {
		cp.newClass(type);
		mv.visitTypeInsn(opcode, type);
	}

	public void visitFieldInsn(final int opcode, final String owner,
			final String name, final String desc) {
		cp.newField(owner, name, desc);
		mv.visitFieldInsn(opcode, owner, name, desc);
	}

	public void visitMethodInsn(final int opcode, final String owner,
			final String name, final String desc) {
		boolean itf = opcode == Opcodes.INVOKEINTERFACE;
		cp.newMethod(owner, name, desc, itf);
		mv.visitMethodInsn(opcode, owner, name, desc);
	}

	public void visitLdcInsn(final Object cst) {
		cp.newConst(cst);
		mv.visitLdcInsn(cst);
	}

	public void visitMultiANewArrayInsn(final String desc, final int dims) {
		cp.newClass(desc);
		mv.visitMultiANewArrayInsn(desc, dims);
	}

	public void visitTryCatchBlock(final Label start, final Label end,
			final Label handler, final String type) {
		if (type != null) {
			cp.newClass(type);
		}
		mv.visitTryCatchBlock(start, end, handler, type);
	}

	public void visitLocalVariable(final String name, final String desc,
			final String signature, final Label start, final Label end,
			final int index) {
		if (signature != null) {
			cp.newUTF8("LocalVariableTypeTable");
			cp.newUTF8(name);
			cp.newUTF8(signature);
		}
		cp.newUTF8("LocalVariableTable");
		cp.newUTF8(name);
		cp.newUTF8(desc);
		mv.visitLocalVariable(name, desc, signature, start, end, index);
	}

	public void visitLineNumber(final int line, final Label start) {
		cp.newUTF8("LineNumberTable");
		mv.visitLineNumber(line, start);
	}

	public void visitMaxs(final int maxStack, final int maxLocals) {
		cp.newUTF8("Code");
		mv.visitMaxs(maxStack, maxLocals);
	}
}
