/***
 * 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.util;

import alterrs.asm.AnnotationVisitor;
import alterrs.asm.Type;

/**
 * An {@link AnnotationVisitor} that prints a disassembled view of the
 * annotations it visits.
 * 
 * @author Eric Bruneton
 */
public class TraceAnnotationVisitor extends TraceAbstractVisitor implements
		AnnotationVisitor {

	/**
	 * The {@link AnnotationVisitor} to which this visitor delegates calls. May
	 * be <tt>null</tt>.
	 */
	protected AnnotationVisitor av;

	private int valueNumber = 0;

	/**
	 * Constructs a new {@link TraceAnnotationVisitor}.
	 */
	public TraceAnnotationVisitor() {
		// ignore
	}

	// ------------------------------------------------------------------------
	// Implementation of the AnnotationVisitor interface
	// ------------------------------------------------------------------------

	public void visit(final String name, final Object value) {
		buf.setLength(0);
		appendComa(valueNumber++);

		if (name != null) {
			buf.append(name).append('=');
		}

		if (value instanceof String) {
			visitString((String) value);
		} else if (value instanceof Type) {
			visitType((Type) value);
		} else if (value instanceof Byte) {
			visitByte(((Byte) value).byteValue());
		} else if (value instanceof Boolean) {
			visitBoolean(((Boolean) value).booleanValue());
		} else if (value instanceof Short) {
			visitShort(((Short) value).shortValue());
		} else if (value instanceof Character) {
			visitChar(((Character) value).charValue());
		} else if (value instanceof Integer) {
			visitInt(((Integer) value).intValue());
		} else if (value instanceof Float) {
			visitFloat(((Float) value).floatValue());
		} else if (value instanceof Long) {
			visitLong(((Long) value).longValue());
		} else if (value instanceof Double) {
			visitDouble(((Double) value).doubleValue());
		} else if (value.getClass().isArray()) {
			buf.append('{');
			if (value instanceof byte[]) {
				byte[] v = (byte[]) value;
				for (int i = 0; i < v.length; i++) {
					appendComa(i);
					visitByte(v[i]);
				}
			} else if (value instanceof boolean[]) {
				boolean[] v = (boolean[]) value;
				for (int i = 0; i < v.length; i++) {
					appendComa(i);
					visitBoolean(v[i]);
				}
			} else if (value instanceof short[]) {
				short[] v = (short[]) value;
				for (int i = 0; i < v.length; i++) {
					appendComa(i);
					visitShort(v[i]);
				}
			} else if (value instanceof char[]) {
				char[] v = (char[]) value;
				for (int i = 0; i < v.length; i++) {
					appendComa(i);
					visitChar(v[i]);
				}
			} else if (value instanceof int[]) {
				int[] v = (int[]) value;
				for (int i = 0; i < v.length; i++) {
					appendComa(i);
					visitInt(v[i]);
				}
			} else if (value instanceof long[]) {
				long[] v = (long[]) value;
				for (int i = 0; i < v.length; i++) {
					appendComa(i);
					visitLong(v[i]);
				}
			} else if (value instanceof float[]) {
				float[] v = (float[]) value;
				for (int i = 0; i < v.length; i++) {
					appendComa(i);
					visitFloat(v[i]);
				}
			} else if (value instanceof double[]) {
				double[] v = (double[]) value;
				for (int i = 0; i < v.length; i++) {
					appendComa(i);
					visitDouble(v[i]);
				}
			}
			buf.append('}');
		}

		text.add(buf.toString());

		if (av != null) {
			av.visit(name, value);
		}
	}

	private void visitInt(final int value) {
		buf.append(value);
	}

	private void visitLong(final long value) {
		buf.append(value).append('L');
	}

	private void visitFloat(final float value) {
		buf.append(value).append('F');
	}

	private void visitDouble(final double value) {
		buf.append(value).append('D');
	}

	private void visitChar(final char value) {
		buf.append("(char)").append((int) value);
	}

	private void visitShort(final short value) {
		buf.append("(short)").append(value);
	}

	private void visitByte(final byte value) {
		buf.append("(byte)").append(value);
	}

	private void visitBoolean(final boolean value) {
		buf.append(value);
	}

	private void visitString(final String value) {
		appendString(buf, value);
	}

	private void visitType(final Type value) {
		buf.append(value.getClassName()).append(".class");
	}

	public void visitEnum(final String name, final String desc,
			final String value) {
		buf.setLength(0);
		appendComa(valueNumber++);
		if (name != null) {
			buf.append(name).append('=');
		}
		appendDescriptor(FIELD_DESCRIPTOR, desc);
		buf.append('.').append(value);
		text.add(buf.toString());

		if (av != null) {
			av.visitEnum(name, desc, value);
		}
	}

	public AnnotationVisitor visitAnnotation(final String name,
			final String desc) {
		buf.setLength(0);
		appendComa(valueNumber++);
		if (name != null) {
			buf.append(name).append('=');
		}
		buf.append('@');
		appendDescriptor(FIELD_DESCRIPTOR, desc);
		buf.append('(');
		text.add(buf.toString());
		TraceAnnotationVisitor tav = createTraceAnnotationVisitor();
		text.add(tav.getText());
		text.add(")");
		if (av != null) {
			tav.av = av.visitAnnotation(name, desc);
		}
		return tav;
	}

	public AnnotationVisitor visitArray(final String name) {
		buf.setLength(0);
		appendComa(valueNumber++);
		if (name != null) {
			buf.append(name).append('=');
		}
		buf.append('{');
		text.add(buf.toString());
		TraceAnnotationVisitor tav = createTraceAnnotationVisitor();
		text.add(tav.getText());
		text.add("}");
		if (av != null) {
			tav.av = av.visitArray(name);
		}
		return tav;
	}

	public void visitEnd() {
		if (av != null) {
			av.visitEnd();
		}
	}

	// ------------------------------------------------------------------------
	// Utility methods
	// ------------------------------------------------------------------------

	private void appendComa(final int i) {
		if (i != 0) {
			buf.append(", ");
		}
	}
}
