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- /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You 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.
- */
-
- /* $Id$ */
-
- package org.apache.fop.afp.modca;
-
- import java.io.IOException;
- import java.io.OutputStream;
-
- import org.apache.fop.afp.modca.triplets.AttributeQualifierTriplet;
- import org.apache.fop.afp.modca.triplets.AttributeValueTriplet;
- import org.apache.fop.afp.modca.triplets.EncodingTriplet;
- import org.apache.fop.afp.modca.triplets.FullyQualifiedNameTriplet;
- import org.apache.fop.afp.util.BinaryUtils;
-
- /**
- * A Tag Logical Element structured field assigns an attribute name and an
- * attribute value to a page or page group. The Tag Logical Element structured
- * field may be embedded directly in the page or page group, or it may reference
- * the page or page group from a document index. When a Tag Logical Element
- * structured field references a page or is embedded in a page following the
- * active environment group, it is associated with the page. When a Tag Logical
- * Element structured field references a page group or is embedded in a page
- * group following the Begin Named Page Group structured field, it is associated
- * with the page group. When a Tag Logical Element structured field is associated
- * with a page group, the parameters of the Tag Logical Element structured field
- * are inherited by all pages in the page group and by all other page groups
- * that are nested in the page group. The scope of a Tag Logical Element is
- * determined by its position with respect to other TLEs that reference, or are
- * embedded in, the same page or page group. The Tag Logical Element structured
- * field does not provide any presentation specifications and therefore has no
- * effect on the appearance of a document when it is presented.
- * <p/>
- */
- public class TagLogicalElement extends AbstractTripletStructuredObject {
-
- /**
- * the params of the TLE
- */
- private State state;
-
- /**
- * Construct a tag logical element with the name and value specified.
- *
- * @param state the state of the tag logical element
- */
-
- public TagLogicalElement(State state) {
- this.state = state;
- }
-
- private void setAttributeValue(String value) {
- addTriplet(new AttributeValueTriplet(value));
- }
-
- private void setEncoding(int encoding) {
- if (encoding != State.ENCODING_NONE) {
- addTriplet(new EncodingTriplet(encoding));
- }
- }
-
- /**
- * Sets the attribute qualifier of this structured field
- *
- * @param seqNumber the attribute sequence number
- * @param levNumber the attribute level number
- */
- public void setAttributeQualifier(int seqNumber, int levNumber) {
- addTriplet(new AttributeQualifierTriplet(seqNumber, levNumber));
- }
-
- /** {@inheritDoc} */
- public void writeToStream(OutputStream os) throws IOException {
- setFullyQualifiedName(
- FullyQualifiedNameTriplet.TYPE_ATTRIBUTE_GID,
- FullyQualifiedNameTriplet.FORMAT_CHARSTR,
- state.key);
- setAttributeValue(state.value);
- setEncoding(state.encoding);
-
- byte[] data = new byte[SF_HEADER_LENGTH];
- copySF(data, Type.ATTRIBUTE, Category.PROCESS_ELEMENT);
-
- int tripletDataLength = getTripletDataLength();
- byte[] l = BinaryUtils.convert(data.length + tripletDataLength - 1, 2);
- data[1] = l[0];
- data[2] = l[1];
- os.write(data);
-
- writeTriplets(os);
- }
-
- /**
- *
- * Holds the attribute state of a TLE
- *
- */
- public static class State {
-
- /**
- * value interpreted as no encoding
- */
- public static final int ENCODING_NONE = -1;
- /** The key attribute */
- private String key;
-
- /** The value attribute */
- private String value;
-
- /** The CCSID character et encoding attribute */
- private int encoding = ENCODING_NONE;
-
-
- /**
- * Constructor
- *
- * @param key the key attribute
- * @param value the value attribute
- */
- public State(String key, String value) {
- this.key = key;
- this.value = value;
- }
-
- /**
- *
- * @param key the key attribute
- * @param value the value attribute
- * @param encoding the CCSID character set encoding attribute
- */
- public State(String key, String value, int encoding) {
- this.key = key;
- this.value = value;
- this.encoding = encoding;
- }
-
-
- }
- }
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