/* * Copyright (c) 2008, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation.  Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code 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 * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */package com.sun.beans.decoder; import java.beans.Expression; import static java.util.Locale.ENGLISH; /** * This class is intended to handle &lt;object&gt; element. * This element looks like &lt;void&gt; element, * but its value is always used as an argument for element * that contains this one. * <p>The following atributes are supported: * <dl> * <dt>class * <dd>the type is used for static methods and fields * <dt>method * <dd>the method name * <dt>property * <dd>the property name * <dt>index * <dd>the property index * <dt>field * <dd>the field name * <dt>idref * <dd>the identifier to refer to the variable * <dt>id * <dd>the identifier of the variable that is intended to store the result * </dl> * * @since 1.7 * * @author Sergey A. Malenkov */class ObjectElementHandler extends NewElementHandler {    private String idref;    private String field;    private Integer index;    private String property;    private String method;     /**     * Parses attributes of the element.     * The following atributes are supported:     * <dl>     * <dt>class     * <dd>the type is used for static methods and fields     * <dt>method     * <dd>the method name     * <dt>property     * <dd>the property name     * <dt>index     * <dd>the property index     * <dt>field     * <dd>the field name     * <dt>idref     * <dd>the identifier to refer to the variable     * <dt>id     * <dd>the identifier of the variable that is intended to store the result     * </dl>     *     * @param name   the attribute name     * @param value  the attribute value     */    @Override    public final void addAttribute(String name, String value) {        if (name.equals("idref")) { // NON-NLS: the attribute name            this.idref = value;        } else if (name.equals("field")) { // NON-NLS: the attribute name            this.field = value;        } else if (name.equals("index")) { // NON-NLS: the attribute name            this.index = Integer.valueOf(value);            addArgument(this.index); // hack for compatibility        } else if (name.equals("property")) { // NON-NLS: the attribute name            this.property = value;        } else if (name.equals("method")) { // NON-NLS: the attribute name            this.method = value;        } else {            super.addAttribute(name, value);        }    }     /**     * Calculates the value of this element     * if the field attribute or the idref attribute is set.     */    @Override    public final void startElement() {        if ((this.field != null) || (this.idref != null)) {            getValueObject();        }    }     /**     * Tests whether the value of this element can be used     * as an argument of the element that contained in this one.     *     * @return {@code true} if the value of this element can be used     *         as an argument of the element that contained in this one,     *         {@code false} otherwise     */    @Override    protected boolean isArgument() {        return true; // hack for compatibility    }     /**     * Creates the value of this element.     *     * @param type  the base class     * @param args  the array of arguments     * @return the value of this element     * @throws Exception if calculation is failed     */    @Override    protected final ValueObject getValueObject(Class<?> type, Object[] args) throws Exception {        if (this.field != null) {            return ValueObjectImpl.create(FieldElementHandler.getFieldValue(getContextBean(), this.field));        }        if (this.idref != null) {            return ValueObjectImpl.create(getVariable(this.idref));        }        Object bean = getContextBean();        String name;        if (this.index != null) {            name = (args.length == 2)                    ? PropertyElementHandler.SETTER                    : PropertyElementHandler.GETTER;        } else if (this.property != null) {            name = (args.length == 1)                    ? PropertyElementHandler.SETTER                    : PropertyElementHandler.GETTER;             if (0 < this.property.length()) {                name += this.property.substring(0, 1).toUpperCase(ENGLISH) + this.property.substring(1);            }        } else {            name = (this.method != null) && (0 < this.method.length())                    ? this.method                    : "new"; // NON-NLS: the constructor marker        }        Expression expression = new Expression(bean, name, args);        return ValueObjectImpl.create(expression.getValue());    }}