/***
 * 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.Attribute;
import alterrs.asm.ClassAdapter;
import alterrs.asm.ClassVisitor;
import alterrs.asm.FieldVisitor;
import alterrs.asm.MethodVisitor;
import alterrs.asm.Opcodes;

/**
 * A {@link ClassVisitor} that collects the {@link Constant}s of the classes it
 * visits.
 * 
 * @author Eric Bruneton
 */
public class ClassConstantsCollector extends ClassAdapter {

	private final ConstantPool cp;

	public ClassConstantsCollector(final ClassVisitor cv, final ConstantPool cp) {
		super(cv);
		this.cp = cp;
	}

	public void visit(final int version, final int access, final String name,
			final String signature, final String superName,
			final String[] interfaces) {
		if ((access & Opcodes.ACC_DEPRECATED) != 0) {
			cp.newUTF8("Deprecated");
		}
		if ((access & Opcodes.ACC_SYNTHETIC) != 0) {
			cp.newUTF8("Synthetic");
		}
		cp.newClass(name);
		if (signature != null) {
			cp.newUTF8("Signature");
			cp.newUTF8(signature);
		}
		if (superName != null) {
			cp.newClass(superName);
		}
		if (interfaces != null) {
			for (int i = 0; i < interfaces.length; ++i) {
				cp.newClass(interfaces[i]);
			}
		}
		cv.visit(version, access, name, signature, superName, interfaces);
	}

	public void visitSource(final String source, final String debug) {
		if (source != null) {
			cp.newUTF8("SourceFile");
			cp.newUTF8(source);
		}
		if (debug != null) {
			cp.newUTF8("SourceDebugExtension");
		}
		cv.visitSource(source, debug);
	}

	public void visitOuterClass(final String owner, final String name,
			final String desc) {
		cp.newUTF8("EnclosingMethod");
		cp.newClass(owner);
		if (name != null && desc != null) {
			cp.newNameType(name, desc);
		}
		cv.visitOuterClass(owner, name, desc);
	}

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

	public void visitAttribute(final Attribute attr) {
		// can do nothing
		cv.visitAttribute(attr);
	}

	public void visitInnerClass(final String name, final String outerName,
			final String innerName, final int access) {
		cp.newUTF8("InnerClasses");
		if (name != null) {
			cp.newClass(name);
		}
		if (outerName != null) {
			cp.newClass(outerName);
		}
		if (innerName != null) {
			cp.newUTF8(innerName);
		}
		cv.visitInnerClass(name, outerName, innerName, access);
	}

	public FieldVisitor visitField(final int access, final String name,
			final String desc, final String signature, final Object value) {
		if ((access & Opcodes.ACC_SYNTHETIC) != 0) {
			cp.newUTF8("Synthetic");
		}
		if ((access & Opcodes.ACC_DEPRECATED) != 0) {
			cp.newUTF8("Deprecated");
		}
		cp.newUTF8(name);
		cp.newUTF8(desc);
		if (signature != null) {
			cp.newUTF8("Signature");
			cp.newUTF8(signature);
		}
		if (value != null) {
			cp.newConst(value);
		}
		return new FieldConstantsCollector(cv.visitField(access, name, desc,
				signature, value), cp);
	}

	public MethodVisitor visitMethod(final int access, final String name,
			final String desc, final String signature, final String[] exceptions) {
		if ((access & Opcodes.ACC_SYNTHETIC) != 0) {
			cp.newUTF8("Synthetic");
		}
		if ((access & Opcodes.ACC_DEPRECATED) != 0) {
			cp.newUTF8("Deprecated");
		}
		cp.newUTF8(name);
		cp.newUTF8(desc);
		if (signature != null) {
			cp.newUTF8("Signature");
			cp.newUTF8(signature);
		}
		if (exceptions != null) {
			cp.newUTF8("Exceptions");
			for (int i = 0; i < exceptions.length; ++i) {
				cp.newClass(exceptions[i]);
			}
		}
		return new MethodConstantsCollector(cv.visitMethod(access, name, desc,
				signature, exceptions), cp);
	}
}
