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Spring Framework example source code file (AbstractHtmlInputElementTag.java)

This example Spring Framework source code file (AbstractHtmlInputElementTag.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Spring Framework tags/keywords

abstracthtmlelementtag, abstracthtmlinputelementtag, accesskey_attribute, disabled_attribute, http, jspexception, jspexception, onblur_attribute, onblur_attribute, onchange_attribute, onchange_attribute, onfocus_attribute, readonly_attribute, servlet, string, string

The Spring Framework AbstractHtmlInputElementTag.java source code

/*
 * Copyright 2002-2007 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.web.servlet.tags.form;

import javax.servlet.jsp.JspException;

/**
 * Base class for databinding-aware JSP tags that render HTML form input element.
 *
 * <p>Provides a set of properties corresponding to the set of HTML attributes
 * that are common across form input elements.
 *
 * @author Rob Harrop
 * @author Rick Evans
 * @author Juergen Hoeller
 * @since 2.0
 */
public abstract class AbstractHtmlInputElementTag extends AbstractHtmlElementTag {

	/**
	 * The name of the '<code>onfocus' attribute.
	 */
	public static final String ONFOCUS_ATTRIBUTE = "onfocus";

	/**
	 * The name of the '<code>onblur' attribute.
	 */
	public static final String ONBLUR_ATTRIBUTE = "onblur";

	/**
	 * The name of the '<code>onchange' attribute.
	 */
	public static final String ONCHANGE_ATTRIBUTE = "onchange";

	/**
	 * The name of the '<code>accesskey' attribute.
	 */
	public static final String ACCESSKEY_ATTRIBUTE = "accesskey";

	/**
	 * The name of the '<code>disabled' attribute.
	 */
	public static final String DISABLED_ATTRIBUTE = "disabled";

	/**
	 * The name of the '<code>readonly' attribute.
	 */
	public static final String READONLY_ATTRIBUTE = "readonly";


	private String onfocus;

	private String onblur;

	private String onchange;

	private String accesskey;

	private String disabled;

	private String readonly;


	/**
	 * Set the value of the '<code>onfocus' attribute.
	 * May be a runtime expression.
	 */
	public void setOnfocus(String onfocus) {
		this.onfocus = onfocus;
	}

	/**
	 * Get the value of the '<code>onfocus' attribute.
	 */
	protected String getOnfocus() {
		return this.onfocus;
	}

	/**
	 * Set the value of the '<code>onblur' attribute.
	 * May be a runtime expression.
	 */
	public void setOnblur(String onblur) {
		this.onblur = onblur;
	}

	/**
	 * Get the value of the '<code>onblur' attribute.
	 */
	protected String getOnblur() {
		return this.onblur;
	}

	/**
	 * Set the value of the '<code>onchange' attribute.
	 * May be a runtime expression.
	 */
	public void setOnchange(String onchange) {
		this.onchange = onchange;
	}

	/**
	 * Get the value of the '<code>onchange' attribute.
	 */
	protected String getOnchange() {
		return this.onchange;
	}

	/**
	 * Set the value of the '<code>accesskey' attribute.
	 * May be a runtime expression.
	 */
	public void setAccesskey(String accesskey) {
		this.accesskey = accesskey;
	}

	/**
	 * Get the value of the '<code>accesskey' attribute.
	 */
	protected String getAccesskey() {
		return this.accesskey;
	}

	/**
	 * Set the value of the '<code>disabled' attribute.
	 * May be a runtime expression.
	 */
	public void setDisabled(String disabled) {
		this.disabled = disabled;
	}

	/**
	 * Get the value of the '<code>disabled' attribute.
	 */
	protected String getDisabled() {
		return this.disabled;
	}

	/**
	 * Sets the value of the '<code>readonly' attribute.
	 * May be a runtime expression.
	 * @see #isReadonly()
	 */
	public void setReadonly(String readonly) {
		this.readonly = readonly;
	}

	/**
	 * Gets the value of the '<code>readonly' attribute.
	 * May be a runtime expression.
	 * @see #isReadonly() 
	 */
	protected String getReadonly() {
		return this.readonly;
	}


	/**
	 * Adds input-specific optional attributes as defined by this base class.
	 */
	protected void writeOptionalAttributes(TagWriter tagWriter) throws JspException {
		super.writeOptionalAttributes(tagWriter);

		writeOptionalAttribute(tagWriter, ONFOCUS_ATTRIBUTE, getOnfocus());
		writeOptionalAttribute(tagWriter, ONBLUR_ATTRIBUTE, getOnblur());
		writeOptionalAttribute(tagWriter, ONCHANGE_ATTRIBUTE, getOnchange());
		writeOptionalAttribute(tagWriter, ACCESSKEY_ATTRIBUTE, getAccesskey());
		if (isDisabled()) {
			tagWriter.writeAttribute(DISABLED_ATTRIBUTE, "disabled");
		}
		if (isReadonly()) {
			writeOptionalAttribute(tagWriter, READONLY_ATTRIBUTE, "readonly");
		}
	}

	/**
	 * Is the current HTML tag disabled?
	 */
	protected boolean isDisabled() throws JspException {
		return "true".equals(evaluate(DISABLED_ATTRIBUTE, getDisabled()));
	}

	/**
	 * Is the current HTML tag readonly?
	 * <p>Note: some {@link AbstractHtmlInputElementTag} subclasses (such a those
	 * for checkboxes and radiobuttons)  may contain readonly attributes, but are
	 * not affected by them since their values don't change (only their status does.)
	 */
	protected boolean isReadonly() throws JspException {
		return "true".equals(evaluate(READONLY_ATTRIBUTE, getReadonly()));
	}

}

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