Copyright (c) 2000, 2013 IBM Corporation and others.
This program and the accompanying materials
are made available under the terms of the Eclipse Public License 2.0
which accompanies this distribution, and is available at
https://www.eclipse.org/legal/epl-2.0/
SPDX-License-Identifier: EPL-2.0
Contributors:
    IBM Corporation - initial API and implementation
       Andy Clement - Contributions for
                         Bug 383624 - [1.8][compiler] Revive code generation support for type annotations (from Olivier's work)
/*******************************************************************************
 * Copyright (c) 2000, 2013 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *        Andy Clement - Contributions for
 *                          Bug 383624 - [1.8][compiler] Revive code generation support for type annotations (from Olivier's work)
 *******************************************************************************/
package org.eclipse.jdt.internal.core.util;

import org.eclipse.jdt.core.util.ClassFormatException;
import org.eclipse.jdt.core.util.IAttributeNamesConstants;
import org.eclipse.jdt.core.util.IClassFileAttribute;
import org.eclipse.jdt.core.util.IConstantPool;
import org.eclipse.jdt.core.util.IConstantPoolConstant;
import org.eclipse.jdt.core.util.IConstantPoolEntry;
import org.eclipse.jdt.core.util.IConstantValueAttribute;
import org.eclipse.jdt.core.util.IFieldInfo;
import org.eclipse.jdt.core.util.IModifierConstants;

Default implementation of IFieldInfo.
/**
 * Default implementation of IFieldInfo.
 */
public class FieldInfo extends ClassFileStruct implements IFieldInfo {
	private int accessFlags;
	private int attributeBytes;
	private IClassFileAttribute[] attributes;
	private int attributesCount;
	private IConstantValueAttribute constantValueAttribute;
	private char[] descriptor;
	private int descriptorIndex;
	private boolean isDeprecated;
	private boolean isSynthetic;
	private char[] name;
	private int nameIndex;

	
Params:
classFileBytes – byte[]
constantPool – IConstantPool
offset – int/**
	 * @param classFileBytes byte[]
	 * @param constantPool IConstantPool
	 * @param offset int
	 */
	public FieldInfo(byte classFileBytes[], IConstantPool constantPool, int offset)
		throws ClassFormatException {
		final int flags = u2At(classFileBytes, 0, offset);
		this.accessFlags = flags;
		if ((flags & IModifierConstants.ACC_SYNTHETIC) != 0) {
			this.isSynthetic = true;
		}
		this.nameIndex = u2At(classFileBytes, 2, offset);
		IConstantPoolEntry constantPoolEntry = constantPool.decodeEntry(this.nameIndex);
		if (constantPoolEntry.getKind() != IConstantPoolConstant.CONSTANT_Utf8) {
			throw new ClassFormatException(ClassFormatException.INVALID_CONSTANT_POOL_ENTRY);
		}
		this.name = constantPoolEntry.getUtf8Value();

		this.descriptorIndex = u2At(classFileBytes, 4, offset);
		constantPoolEntry = constantPool.decodeEntry(this.descriptorIndex);
		if (constantPoolEntry.getKind() != IConstantPoolConstant.CONSTANT_Utf8) {
			throw new ClassFormatException(ClassFormatException.INVALID_CONSTANT_POOL_ENTRY);
		}
		this.descriptor = constantPoolEntry.getUtf8Value();

		this.attributesCount = u2At(classFileBytes, 6, offset);
		this.attributes = ClassFileAttribute.NO_ATTRIBUTES;
		int readOffset = 8;
		if (this.attributesCount != 0) {
			this.attributes = new IClassFileAttribute[this.attributesCount];
		}
		int attributesIndex = 0;
		for (int i = 0; i < this.attributesCount; i++) {
			constantPoolEntry = constantPool.decodeEntry(u2At(classFileBytes, readOffset, offset));
			if (constantPoolEntry.getKind() != IConstantPoolConstant.CONSTANT_Utf8) {
				throw new ClassFormatException(ClassFormatException.INVALID_CONSTANT_POOL_ENTRY);
			}
			char[] attributeName = constantPoolEntry.getUtf8Value();
			if (equals(attributeName, IAttributeNamesConstants.DEPRECATED)) {
				this.isDeprecated = true;
				this.attributes[attributesIndex++] = new ClassFileAttribute(classFileBytes, constantPool, offset + readOffset);
			} else if (equals(attributeName, IAttributeNamesConstants.SYNTHETIC)) {
				this.isSynthetic = true;
				this.attributes[attributesIndex++] = new ClassFileAttribute(classFileBytes, constantPool, offset + readOffset);
			} else if (equals(attributeName, IAttributeNamesConstants.CONSTANT_VALUE)) {
				this.constantValueAttribute = new ConstantValueAttribute(classFileBytes, constantPool, offset + readOffset);
				this.attributes[attributesIndex++] = this.constantValueAttribute;
			} else if (equals(attributeName, IAttributeNamesConstants.SIGNATURE)) {
				this.attributes[attributesIndex++] = new SignatureAttribute(classFileBytes, constantPool, offset + readOffset);
			} else if (equals(attributeName, IAttributeNamesConstants.RUNTIME_VISIBLE_ANNOTATIONS)) {
				this.attributes[attributesIndex++] = new RuntimeVisibleAnnotationsAttribute(classFileBytes, constantPool, offset + readOffset);
			} else if (equals(attributeName, IAttributeNamesConstants.RUNTIME_INVISIBLE_ANNOTATIONS)) {
				this.attributes[attributesIndex++] = new RuntimeInvisibleAnnotationsAttribute(classFileBytes, constantPool, offset + readOffset);
			} else if (equals(attributeName, IAttributeNamesConstants.RUNTIME_VISIBLE_TYPE_ANNOTATIONS)) {
				this.attributes[attributesIndex++] = new RuntimeVisibleTypeAnnotationsAttribute(classFileBytes, constantPool, offset + readOffset);
			} else if (equals(attributeName, IAttributeNamesConstants.RUNTIME_INVISIBLE_TYPE_ANNOTATIONS)) {
				this.attributes[attributesIndex++] = new RuntimeInvisibleTypeAnnotationsAttribute(classFileBytes, constantPool, offset + readOffset);
			} else {
				this.attributes[attributesIndex++] = new ClassFileAttribute(classFileBytes, constantPool, offset + readOffset);
			}
			readOffset += (6 + u4At(classFileBytes, readOffset + 2, offset));
		}

		this.attributeBytes = readOffset;
	}
	
See Also:
getAccessFlags.getAccessFlags()/**
	 * @see IFieldInfo#getAccessFlags()
	 */
	@Override
	public int getAccessFlags() {
		return this.accessFlags;
	}
	
See Also:
getAttributeCount.getAttributeCount()/**
	 * @see IFieldInfo#getAttributeCount()
	 */
	@Override
	public int getAttributeCount() {
		return this.attributesCount;
	}

	
See Also:
getAttributes.getAttributes()/**
	 * @see IFieldInfo#getAttributes()
	 */
	@Override
	public IClassFileAttribute[] getAttributes() {
		return this.attributes;
	}

	
See Also:
getConstantValueAttribute.getConstantValueAttribute()/**
	 * @see IFieldInfo#getConstantValueAttribute()
	 */
	@Override
	public IConstantValueAttribute getConstantValueAttribute() {
		return this.constantValueAttribute;
	}

	
See Also:
getDescriptor.getDescriptor()/**
	 * @see IFieldInfo#getDescriptor()
	 */
	@Override
	public char[] getDescriptor() {
		return this.descriptor;
	}

	
See Also:
getDescriptorIndex.getDescriptorIndex()/**
	 * @see IFieldInfo#getDescriptorIndex()
	 */
	@Override
	public int getDescriptorIndex() {
		return this.descriptorIndex;
	}

	
See Also:
getName.getName()/**
	 * @see IFieldInfo#getName()
	 */
	@Override
	public char[] getName() {
		return this.name;
	}

	
See Also:
getNameIndex.getNameIndex()/**
	 * @see IFieldInfo#getNameIndex()
	 */
	@Override
	public int getNameIndex() {
		return this.nameIndex;
	}
	
See Also:
hasConstantValueAttribute.hasConstantValueAttribute()/**
	 * @see IFieldInfo#hasConstantValueAttribute()
	 */
	@Override
	public boolean hasConstantValueAttribute() {
		return this.constantValueAttribute != null;
	}

	
See Also:
isDeprecated.isDeprecated()/**
	 * @see IFieldInfo#isDeprecated()
	 */
	@Override
	public boolean isDeprecated() {
		return this.isDeprecated;
	}

	
See Also:
isSynthetic.isSynthetic()/**
	 * @see IFieldInfo#isSynthetic()
	 */
	@Override
	public boolean isSynthetic() {
		return this.isSynthetic;
	}

	int sizeInBytes() {
		return this.attributeBytes;
	}
}